SUSY07

Europe/Zurich
Physics Building (Karlsruhe University)

Physics Building

Karlsruhe University

Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
Dieter Zeppenfeld (Karlsruhe University) , Wim de Boer (Karlsruhe University)
Description
The 15th International Conference on Supersymmetry and the Unification of Fundamental Interactions.
Participants
  • Abdelhak Djouadi
  • Achim Denig
  • Adam Falkowski
  • Adam Gibson
  • Adam Smetana
  • Adonis Papaikonomou
  • Agbenafa Annie Awenam
  • Akin Wingerter
  • Albert De Roeck
  • Alejandro Ibarra
  • Alex Kastanas
  • Alexander Bednyakov
  • Alexander Belyaev
  • Alexander Blum
  • Alexander Merle
  • Alexander Muck
  • Alexander Schmidt
  • Alexander Schüssler
  • Alexander Westphal
  • Alexandre Arbey
  • Alexei Sheplyakov
  • Alexey Gladyshev
  • Ali Övgün
  • Alper Hayreter
  • Alpha Turay
  • Altan Cakir
  • Alvaro Veliz Osorio
  • Anders Basbøll
  • Andre Sopczak
  • Andrea Ferrantelli
  • Andreas Bauer
  • Andreas Crivellin
  • Andreas Gessler
  • Andreas Jaeger
  • Andreas Oehler
  • Andreas Sabellek
  • Andreas Scharf
  • Andreas Schmidt
  • Andrei Linde
  • Andrew Box
  • Andrew Brown
  • Andrey Katz
  • Andrey Loginov
  • Andrzej Czarnecki
  • Anna Lipniacka
  • Antonella De Santo
  • Antonio Masiero
  • Antonio Policicchio
  • Anupam Mazumdar
  • Anupama Atre
  • Are R. Raklev
  • Armin Scheurer
  • Arnaud Duperrin
  • Arne Weber
  • Asesh K. Datta
  • Asli Sabanci
  • Astrid Chantelauze
  • Avelino Vicente
  • Axel Krause
  • Ayres Freitas
  • Ben Lillie
  • Ben O'Leary
  • Benedict Harling
  • Benjamin Allanach
  • Benjamin Fuchs
  • Benjamin Fuks
  • Benjamin Koch
  • Bernhard Ledermann
  • Bernhard Schraußer
  • Bhaskar Dutta
  • Bianca Keilhauer
  • Bienvenue Malumba
  • Björn Duling
  • Björn Herrmann
  • Brent Nelson
  • Bumseok Kyae
  • Carl Albright
  • Carlos Chavez
  • Carlos Falquez
  • Caron Sascha
  • Carsten Magass
  • Cecilia Jarlskog
  • Charalampos Anastasiou
  • Christian Autermann
  • Christian Sander
  • Christian Scherrer
  • Christian Spethmann
  • Christoph Englert
  • Christoph Hackstein
  • Christoph Luhn
  • Christoph Lüdeling
  • Christoph Ruwiedel
  • Christophe Clement
  • Christophe Saout
  • Christopher Smith
  • Chung Kao
  • Chung-Lin Shan
  • Claudia Hagedorn
  • Claudia Marino
  • Csaba Balazs
  • Dan Hooper
  • Daniel A. Stricker-Shaver
  • Daniel Chung
  • Daniel Däuwel
  • Daniel McKinsey
  • Darin Acosta
  • David Toback
  • David Tucker-Smith
  • Debora Leone
  • Diego Guadagnoli
  • Dieter Zeppenfeld
  • Dietrich Janet
  • Dirk Seidel
  • Dirk Zerwas
  • Dmitri Kazakov
  • Dmitriy Yudin
  • Dmitry Belyaev
  • Dominic Hirschbuehl
  • Dominik Scherer
  • Dominik Stockinger
  • Dong-Won Jung
  • Dorian Kcira
  • Dumitru Ghilencea
  • Durmus Karabacak
  • Eduardo Pontón
  • Eduardo Rojas Peña
  • Edward (Rocky) Kolb
  • Eiman Abou El Dahab
  • Elisabeth Kant
  • Elliott Cheu
  • Else Lytken
  • Emanuel Nikolidakis
  • Emilie Passemar
  • Emmanuel Moulin
  • Etsuko Itou
  • Eugen Mihaita Cioroianu
  • Eva Barbara Ziebarth
  • Evelyne Daubie
  • Fabian Schüssler
  • Falk Metzler
  • Farvah Nazila Mahmoudi
  • Felix Brümmer
  • Florian Ahles
  • Florian Fränkle
  • Florian Gmeiner
  • Florian Plentinger
  • Francisco Campanario
  • Frank Wilczek
  • Frank Daniel Steffen
  • Frank Deppisch
  • Franziska Hofmann
  • Fred-Markus Stober
  • Frederic J. Ronga
  • Fumihiro Takayama
  • Fuminobu Takahashi
  • Gabe Rosenbaum
  • Gabe Shaughnessy
  • Georg Weiglein
  • George Wei-Shu Hou
  • Georgios Choudalakis
  • Gerald Grenier
  • Gernot Krobath
  • Gianmassimo Tasinato
  • Gilbert Moultaka
  • Gino Isidori
  • Giovanni Crosetti
  • Giuseppe Bozzi
  • Giuseppe Dibitetto
  • Giuseppe Torri
  • Gordon Lim
  • Greg Landsberg
  • Gregory Schott
  • Grigory Vartanov
  • Gudrid Moortgat-Pick
  • Guglielmo De Nardo
  • Guido Bell
  • Gunnar Klämke
  • Günter Quast
  • Hans Jürgen Simonis
  • Hans Peter Nilles
  • Hans-Ulrich Martyn
  • Hassan Hassanabadi
  • Heidi Rzehak
  • Heinrich Paes
  • Hitoshi Murayama
  • Holger Kluck
  • Hooman Davoudiasl
  • Howard Haber
  • Howard Baer
  • Hsin-Chia Cheng
  • Hubert Kroha
  • Iain Peddie
  • Igor Goncharenko
  • Ilia Gogoladze
  • Ilkay Turk Cakir
  • Ilya Kravchenko
  • Ioana Codrina Maris
  • Iris Gebauer
  • Irja Schall
  • Isabelle Ripp-Baudot
  • Iulian Negru
  • Ivonne Zavala
  • Jacob Wacker
  • Jae Yong Lee
  • Jae-hyeon Park
  • James Walder
  • Jan Germer
  • Jan Lueck
  • Jan Morlock
  • Jan Olzem
  • Jared Kaplan
  • Jari Laamanen
  • Jason Kumar
  • Jeannine Deger-Glaeser
  • Jeannine Wagner
  • Jens Salomon
  • Jeonghyeon Song
  • Joachim Brod
  • Joachim Heuser
  • Joachim Kopp
  • Joel Jones Perez
  • Johan Blouw
  • Johann Kühn
  • John McDonald
  • John Dixon
  • John Ellis
  • John Gunion
  • Jonathan Bagger
  • Jong-Phil Lee
  • Josef Pradler
  • Julia Weinelt
  • Jörg Rittinger
  • Jörn Kersten
  • Jürgen Gast
  • Jürgen Reuter
  • Kai Uwe Gassmann
  • Karina Williams
  • Karl Jakobs
  • Karl-Heinz Hoffmann
  • Karsten Köneke
  • Karsten Schnitter
  • Kathrin Valerius
  • Kathryn Zurek
  • Kazunari Shima
  • Kazunobu Maruyoshi
  • Kazutoshi Ohta
  • Keisho Hidaka
  • Keith Olive
  • Kentarou Mawatari
  • Kerim Suruliz
  • Kingman Cheung
  • Kishore Marathe
  • Klaus Eitel
  • Klaus-Michael Aye
  • Koji Ishiwata
  • Krzysztof Meissner
  • Krzysztof Rolbiecki
  • Krzysztof Turzynski
  • Lars Hofer
  • Laura Baudis
  • Laura Covi
  • Leandro Da Rold
  • Leila Medari
  • Li Qiang
  • Liliana Velasco-Sevilla
  • Lisa Everett
  • Lorenzo Calibbi
  • Louis Clavelli
  • Luca Ferretti
  • Lumb Debra
  • Luminita Mihaila
  • Lyndon Evans
  • Mads Toudal Frandsen
  • Maike K. Trenkel
  • Malgorzata Worek
  • Manfred Lindner
  • Mani Tripathi
  • Mansoora Shamim
  • Manuel Bähr
  • Manuel Renz
  • Mareike Haberichter
  • Maria Herrero
  • Maria Rozanska
  • Maria Spiropulu
  • Mariangela Lisanti
  • Marita Mosconi
  • Markus Horn
  • Markus Klute
  • Markus Knopf
  • Markus Schulze
  • Markus Schumacher
  • Markus Schwarz
  • Markus Weber
  • Martin Flechl
  • Martin Gorbahn
  • Martin Heck
  • Martin Niegel
  • Masahide Yamaguchi
  • Masahiro Ibe
  • Masami Chiba
  • Massimiliano Chiorboli
  • Mathias Garny
  • Matthew Greeno
  • Matthew Reece
  • Matthias Kauth
  • Matthias Steinhauser
  • Matthias Werner
  • Mattias Blennow
  • Maurizio Pierini
  • Max Scheulen
  • Maxim Perelstein
  • Meenakshi Narain
  • Melanie Ganz
  • Meng Su
  • Michael Herbst
  • Michael Kubocz
  • Michael Milnik
  • Michael Ratz
  • Michael Rauch
  • Michael Schmidt
  • Michael Spannowsky
  • Michael Tytgat
  • Michael Wick
  • Michal Kreps
  • Michal Malinsky
  • Michela Lenzi
  • Michelangelo Mangano
  • Michele Trapletti
  • Miguel Angel Sanchis Lozano
  • Mike Schmanau
  • Mikhail Shifman
  • Mitsuru Kakizaki
  • Mohammad Hussein
  • Momchil Davidkov
  • Monica D'Onofrio
  • Monica Vazquez Acosta
  • Monika Gabriele Honecker
  • Monika Kollar
  • Motoi Endo
  • Mu-Chun Chen
  • Murli Verma
  • Myriam Mondragon
  • Nancy Marinelli
  • Nathaniel Craig
  • Nicolas Greiner
  • Nicolas Schul
  • Nikolai Zerf
  • Nils Krumnack
  • Nishanth Abu Gudapati
  • Nitesh Soni
  • Nobuhiro Uekusa
  • Norisuke Sakai
  • Nurcan Ozturk
  • Olav Mundal
  • Oleg Lebedev
  • Olga Pfeifer
  • Oliver Brein
  • Oliver Eyton-Williams
  • Olivier Wantz
  • Orhan Cakir
  • Oscar M. Vives Garcia
  • Oscar Stål
  • Paavo Tiitola
  • Paolo Beltrame
  • Paride Paradisi
  • Partha Konar
  • Paula Gina Isar
  • Pavel Fileviez Perez
  • Pavel Petrov
  • Pearl Sandick
  • Pedro Schwaller
  • Peter Athron
  • Peter Matthias Zerwas
  • Peter Schleper
  • Peter Uwer
  • Petr Benes
  • Philip Bechtle
  • Philipp Kant
  • Philipp Mack
  • Philipp Maierhöfer
  • Philipp Sturm
  • Pierre Brun
  • Pierre-Antoine Delsart
  • Pieter van den Berg
  • Piotr Traczyk
  • Piotr Zalewski
  • Poulose Poulose
  • Pyungwon Ko
  • Qaisar Shafi
  • Rachid Lemrani
  • Ralf Ulrich
  • Richard Hill
  • Richard Adu-Gyamfi
  • Richard Howl
  • Robert Garisto
  • Robert Graham
  • Robert Harlander
  • Robert Hodgkinson
  • Roberto Contino
  • Roberto Franceschini
  • Robindra Prabhu
  • Roman Nevzorov
  • Rouven Essig
  • Sabine Kraml
  • Sabine Reisser
  • Sandra Horvat
  • Sandra Leone
  • Sanjay Swain
  • Santosh Rai
  • Sascha Bornhauser
  • Satoru Kaneko
  • Satyanarayan Nandi
  • Schedar Marchetti
  • Sebastian Fleischmann
  • Sebastian Grab
  • Sebastian Jäger
  • Sebastian Neubauer
  • Seong Youl Choi
  • Sergey Sukhoruchkin
  • Seungwon Baek
  • Sezen Sekmen
  • Shikma Bressler
  • Shin Sasaki
  • Shoichi Ichinose
  • Siba Prasad Das
  • Silviu Constantin Sararu
  • Simon Honc
  • Simon Plätzer
  • Simon Tyler
  • Simon Wendel
  • Soeren Wiesenfeldt
  • Sophy Palmer
  • Stan Lai
  • Stefan Bekavac
  • Stefan Berge
  • Stefan Groot Nibbelink
  • Stefan Hesselbach
  • Stefan König
  • Stefan Prestel
  • Stefano Moretti
  • Stefano Profumo
  • Stefano Scopel
  • Steffen Müller
  • Steffen Nehls
  • Stephan Horner
  • Stephan Huber
  • Stephan Lammel
  • Stephan Walter
  • Stephane Lavignac
  • Stephanie Trine
  • Steven Robertson
  • Stuart Raby
  • Su-Jung Park
  • Subhendu Rakshit
  • Sukanta Dutta
  • Susana Cabrera
  • Susanne Mertens
  • Susanne Westhoff
  • Sven Heinemeyer
  • Svenja Richter
  • Tania Robens
  • Teruki Kamon
  • Theodoros Diakonidis
  • Therese Sjursen
  • Thiansin Liamsuwan
  • Thomas Asch
  • Thomas Dent
  • Thomas Gajdosik
  • Thomas Göpfert
  • Thomas Hahn
  • Thomas Kernreiter
  • Thomas Konstandin
  • Thomas Kuhr
  • Thomas Müller
  • Thomas Nunnemann
  • Thomas Peiffer
  • Thorsten Chwalek
  • Tilman Plehn
  • Tim Scanlon
  • Timo Ruppell
  • Tomas Hällgren
  • Tomislav Prokopec
  • Tomohiro Matsuda
  • Tomohisa Takimi
  • Tonnis ter Veldhuis
  • Toshihiko Ota
  • Tracey Berry
  • Tulika Bose
  • Tuomas Honkavaara
  • Tzu-Chiang Yuan
  • Ulrich Ellwanger
  • Ulrich Nierste
  • Vadym Zhuravlov
  • Valeri Dvoeglazov
  • Valeriy Nazaruk
  • Valery Zhukov
  • Vangelis Katikaridis
  • Vassilis Spanos
  • Vera Hankele
  • Viviana Niro
  • Vladimir Vasiliev
  • Volker Büge
  • Vyacheslav Krutelyov
  • Vyacheslav Rychkov
  • Waldemar Martens
  • Walmar Porto
  • Werner Porod
  • Wim de Boer
  • Wladimir Gall
  • Wolfgang Altmannshofer
  • Wolfgang Hollik
  • Wolfgang Kluge
  • Wolfgang Mader
  • Wolfgang Wagner
  • Xavier Calmet
  • Xavier Portell Bueso
  • Xerxes Tata
  • Xiaohong Wu
  • Yamamoto Shimpei
  • Yoshifumi Hyakutake
  • Yosuke Yusa
  • Yudi Santoso
  • Yuri Gershtein
  • Yutaka Sakamura
  • Yves Sirois
  • Zurab Tavartkiladze
    • 19:00 22:00
      Welcome Drink At the pond next to the physics building

      At the pond next to the physics building

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      On-site registration opens.

      Click here for further information.

    • 09:00 10:00
      Plenary Session Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 09:00
        Welcome 15m Gerthsen-Auditorium

        Gerthsen-Auditorium

        Karlsruhe University

        Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
        Speaker: Detlef Loehe
      • 09:15
        Supersymmetry, from its Beginning to its Deformation 40m Gerthsen-Auditorium

        Gerthsen-Auditorium

        Karlsruhe University

        Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
        Speaker: Julius Wess
    • 10:00 10:30
      coffee break 30m Gaede-Foyer

      Gaede-Foyer

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
    • 10:30 12:00
      Plenary Session Gerthsen-Auditorium

      Gerthsen-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 10:30
        Status of Cosmology 40m
        Speaker: Edward Kolb
        Slides
      • 11:15
        Anticipating a New Golden Age 40m
        Speaker: Frank Wilczek
        Paper
        Slides
    • 14:00 16:00
      Alternatives 1 Small Auditorium B

      Small Auditorium B

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Warped/Composite Phenomenology Simplified 20m
        I will present a simple effective Lagrangian description of warped extra-dimensional theories which includes the Standard Model particles and the first TeV-scale excitations. This economical approach to warped/composite theories greatly simplifies their phenomenological investigation and collider searches.
        Speaker: Roberto Contino (CERN)
        Slides
      • 14:20
        Collider signatures of new heavy quarks 20m
        Heavy quarks which mix with the Standard Model states appear in many new physics scenarios. We study signatures of such generic heavy quarks at hadron colliders as a function of their mass and mixing. We explore the interesting channel of single production of heavy quarks via electroweak processes. This channel has improved sensitivity compared to the kinematically suppressed QCD pair production at slightly large masses (where pair production falls rapidly). We find that the current run of the Tevatron with 2 fb-1 integrated luminosity has significant sensitivity for the production of such heavy quarks. One example of a new physics scenario where this analysis is applicable is models of warped extra dimensions with custodial symmetry. Such models have light Kaluza-Klein excitations of the fermions which could lead to possible direct detection of extra dimensions at the Tevatron.
        Speaker: Anupama Atre (University of Wisconsin - Madison)
        Slides
      • 14:40
        Warped Gravitons at the LHC and Beyond 20m
        We study the production and decay of Kaluza-Klein (KK) gravitons at the Large Hadron Collider (LHC), in the framework of a warped extra dimension in which the Standard Model (SM) fields propagate. Such a scenario can provide solutions to both the Planck-weak hierarchy problem and the flavor puzzle of the SM. In this scenario, the production via $q \bar{q}$ annihilation and decays to the conventional photon and lepton channels are highly suppressed. However, we show that graviton production via gluon fusion followed by decay to longitudinal $Z/W$ can be significant; vector boson fusion is found to be a sub-dominant production mode. In particular, the ``golden'' $ZZ$ decay mode offers a distinctive 4-lepton signal that could lead to the observation at the LHC of a KK graviton with a mass up to $\sim 2$ TeV for the ratio of the AdS$_5$ curvature to Planck scale modestly above unity. We argue that (contrary to the lore) such a size of the curvature scale can still be within the regime of validity of the framework. Upgrades beyond the LHC design are required to discover gravitons heavier than $\sim 4$ TeV, as favored by the electroweak and flavor precision tests.
        Speaker: Dr Hooman Davoudiasl (Brookhaven National Laboratory)
        Slides
      • 15:00
        Searching for the Kaluza-Klein Graviton in Bulk RS Models 20m
        The best-studied version of the RS1 model has all the Standard Model particles confined to the TeV brane. However, recent variants have the Standard Model fermions and gauge bosons located in the bulk five-dimensional spacetime. We study the potential reach of the LHC in searching for the lightest KK partner of the graviton in the most promising such models in which the right-handed top is localized very near the TeV brane and the light fermions are localized near the Planck brane. We consider both detection and the establishment of the spin-2 nature of the resonance should it be found.
        Speaker: Jared Kaplan (Harvard University)
        Slides
      • 15:20
        The Randall-Sundrum model and high-P_T tops 20m
        In many Randall-Sundrum constructions a large fraction of the new physics shows up as resonances in the t-tbar spectrum. These tops are produced at high invariant mass and p_T, and hence the decay products are highly collimated. This presents interesting challenges for observation. We show that, not only can these resonances be observed, but studies of their properties can reveal much information about the underlying model.
        Speaker: Ben Lillie (Argonne / U. Chicago, EFI)
        Slides
      • 15:40
        Non-SUSY searches at HERA 20m
        Non-SUSY searches at HERA
        Speaker: Peter Schleper (CERN)
        Paper
        Slides
    • 14:00 16:00
      Colliders - Higgs Phenomenology 1 (Experiment) Small Auditorium A

      Small Auditorium A

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Search for Associated Production of Higgs and EW Bosons at the Tevatron 30m
        Presenting results from D0 and CDF
        Speaker: Meenakshi Narain (Brown University)
        Slides
      • 14:30
        Search for Higgs Bosons in H to WW Decays at the Tevatron 30m
        Results from CDF and D0.
        Speaker: Nils Krumnack (Baylor University)
        Paper
        Slides
      • 15:00
        Search for Supersymmetric Neutral Higgs Bosons at the Tevatron 30m
        Speaker: Tim Scanlon (Imperial College, London)
        Paper
        Slides
      • 15:30
        Search for Higgs decays to tau lepton pairs 30m
        Speaker: Ilya Kravchenko (Massachusetts Institute of Technology (MIT))
        Paper
        Slides
    • 14:00 16:00
      Colliders - Susy Phenomenology 1 (Theory) Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Chairperson: Werner POROD

      • 14:00
        Towards reconstructing the SUSY Lagrangian with Fittino 20m
        If SUSY is realized at the TeV scale, it will likely be discovered at the LHC. After discovery, it is crucial to gain information about SUSY Lagrangian parameters from the measured observables with minimal prejudice. Fittino is a program which performs a global fit of a defineable set of parameters to observables accessible at the LHC and the ILC. We will give examples of such fits, report on progress towards implementing LHC observable in a more direct way as well as on inclusion of low energy observables into the fit.
        Speaker: Philip Bechtle (DESY)
        Slides
      • 14:20
        SFitter: Reconstructing the MSSM Lagrangian from LHC data 20m
        The LHC provides us with new possibilities to test physics at the TeV scale and look for signs of new physics beyond the Standard Model. If supersymmetry at the TeV scale is realised in nature, LHC will be able to find many new particles and measure cross sections and branching ratios which differ significantly from Standard Model expectations. Then the question will arise: "What is the value of the fundamental parameters in the MSSM Lagrangian?" SFitter is a tool to answer this question. It takes the LHC data as input and performs a scan over the parameter space using the unconstrained TeV-scale MSSM Lagrangian. A newly developed Weighted-Markov-Chain technique performs this task in a more efficient way. Besides finding the best fit, SFitter also produces a ranked list of secondary minima and a likelihood map, which can be integrated over several parameters to produce one- or two-dimensional probability maps.
        Speaker: Dr Michael Rauch (University of Edinburgh)
        Paper
        Slides
      • 14:40
        SUSY breaking now easy and generic 20m
        It used to be believed that SUSY breaking was difficult and required very special models with specific gauge groups and particle contents. I show that breaking SUSY and communicating it to the standard model can be done now with a wide variety of gauge groups and particle contents via gauge mediation. I will also discuss its implications on cosmology and collider searches.
        Speaker: Hitoshi Murayama (Berkeley National Laboratory)
      • 15:00
        About the Running and Decoupling in the MSSM 20m
        We discuss two issues related to the precise determination of the input parameters of the supersymmetric QCD. As a first application we propose a consistent evaluation of $\alpha_s$ at the GUT scale in the MSSM based on three-loop running and two-loop matching. In the second part of the talk, the evaluation of the bottom quark mass in the $\overline{\rm DR}$ scheme at the electroweak/SUSY scale with four-loop accuracy will be considered.
        Speaker: Dr Luminita Mihaila (TTP-University of Karlsruhe)
        Paper
        Slides
      • 15:20
        Unitarity constraints on trilinear couplings in the MSSM 20m
        For MSSM phenomenology, soft SUSY-breaking dimension-three operators are important, in particular the couplings between Higgs bosons and squarks. In scattering processes, perturbative unitarity is violated at modest center-of-mass energy if these couplings are much larger than the masses of the scalar particles involved. Assuming perturbative unitarity, constraints on the trilinear couplings can be determined using a computer program developed by the authors.
        Speaker: Alexander Schüssler (Universtity of Karlsruhe)
        Paper
        Slides
      • 15:40
        LHC/ILC analysis for SUSY scenarios with heavy sfermions 20m
        We discuss the potential of combined analyses at LHC and ILC to explore low-energy supersymmetry in a difficult region of the parameter space characterized by masses of the scalar SUSY particles around 2 TeV. Precision analyses of cross sections for light chargino production and forward--backward asymmetries of decay leptons and hadrons at the ILC, together with mass information on chi^0_2 and squarks from the LHC, allow us to determine the underlying fundamental gaugino/higgsino MSSM parameters and to constrain the masses of the heavy, kinematically inaccessible sparticles. No assumptions on a specific SUSY-breaking mechanism are imposed.
        Speaker: Dr Gudrid Moortgat-Pick (IPPP Durham)
        Paper
        Slides
    • 14:00 16:00
      Cosmology 1 Lehmann-Auditorium

      Lehmann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Indirect search for Dark Matter with the ANTARES neutrino telescope 20m
        The ANTARES undersea neutrino telescope consists of a 3D grid of 900 photomultiplier tubes arranged in 12 strings, at a depth of 2475 m in the Mediterranean Sea. After deployment of the first strings in 2006, half of the detector is now fully operational and the complete detector is foreseen to be finished in early 2008. Relic neutralinos produced after the Big Bang are favoured candidates for Dark Matter. They can accumulate at the centre of massive celestial objects like our Sun. Their annihilation can result in a high-energy neutrino flux that could be detectable as a localised emission with earth-based neutrino telescopes like ANTARES. A brief overview of the prospects of the indirect search for Dark Matter particles with the ANTARES detector will be given. The analysis method and expected performance for the detection of the expected neutrinos will be discussed.
        Speaker: Mr Gordon Lim (NIKHEF / ANTARES)
        Paper
        Slides
      • 14:20
        Where.when and how SUSY is showering in the sky 20m
        Cosmic Rays and UHECR are reaching highest energy well above LHC ones. Because photopion production they might hide UHE GZK neutrino that may airshower at Earth Horizons. These Airshowers mostly are Tau induced ones. SUSY traces might be also searched inside the same UHECR shower occuring on Earth. Indeed UHE neutralino and other surprising SUSY secondaries may offer a novel Astronomy at the edge by inclined airshowering. We explain why such SUSY and Neutrino traces maybe discovered in present Telescopes. as Magic one, and Gamma Satellites as GLAST , EUSO ones. Where, when and how their traces maybe revealed and disentangled from Neutrino ones will be shown in detalis.
        Speaker: Prof. Daniele Fargion (Physics Department, Rome University 1 and INFN Rome)
        Slides
      • 14:40
        Neutrinos from WIMP annihilations 20m
        We make an improved analysis on the flow of neutrinos originating from WIMP annihilations inside the Sun and the Earth. We treat both neutrino interaction and oscillation effects in a consistent framework. Our numerical simulations are performed in an event based setting, which is useful for both theoretical studies and for creating neutrino telescope Monte Carlos. We find that the flow of muon-type neutrinos is enhanced or suppressed depending on the dominant WIMP annihilation channel.
        Speaker: Mr Mattias Blennow (Royal Institute of Technology)
        Paper
        Slides
      • 15:00
        Reflection of Microwave from Energy Deposit by X-ray Irradiation in Rock Salt: Implying Salt Ultra High Energy Neutrino Detector to act like a Radio Bubble Chamber 20m
        We found microwave reflection from a small rock salt samples irradiated by X-ray. The reflection rate was consistent with number of ionized electrons by the irradiation. Coherent reflection was indicated by time dependence of the reflection rate. It means the irradiated size could be scaled up to ultra-high energy electromagnetic shower using longer wavelength while the reflection rate is kept. Information from antennae would be utilized to 3D reconstruction of the electromagnetic shower like as a radio bubble chamber. Pulse radar emission power could be as large as MW then radio wave can travel 10 attenuation length (2-3km) to be detected. The construction cost could be reduced much if the radar method is applicable, since number of boreholes can be reduced in which detection antennae are installed.
        Speaker: Dr Masami Chiba (Tokyo Metropolitan University)
        Paper
        Slides
      • 15:20
        Long lived staus in IceCube from atmospheric neutrinos 20m
        The discovery of a long-lived charged particle at future colliders can point towards scenarios where the dark matter (DM) particle is superweakly interacting, and the next-to-lightest particle (NLP) is charged and quasi-stable. Such a situation is expected in several supersymmetric models, including gauge mediation and even minimal supergravity, where the DM particle is the gravitino and the charged NLP is the lightest stau. Probing the nature, and directly detecting the DM particle can be, in this case, extremely challenging. One, if not the only handle one would have is to detect with neutrino telescopes the charged NLP's produced in high energy neutrino collisions with nuclei. Previous studies focused on the production of staus from extra-galactic neutrinos, whose flux is, however, largely uncertain and has not been detected yet. In the present analysis, we study the production of charged NLP's from conventional atmospheric neutrinos and from neutrinos originating from the prompt decay of heavy quarks. We quantify and compare the resulting stau fluxes with what expected from extra-galactic neutrinos. We analyze the dependence of the stau flux on the underlying supersymmetric setup, and point out that even if the extra-galactic flux is very suppressed, prompt decay neutrinos can still provide a sufficient flux of staus at IceCube. We also comment on the flux of charged NLP's expected from proton-proton collisions, and show that it is typically subdominant, and always below detectable rates.
        Speaker: Dr Stefano Profumo (Caltech and UC Santa Cruz)
        Slides
      • 15:40
        Indirect dark matter search with H.E.S.S. 20m
        The annihilations of WIMPs produce high energy gamma-rays in the final state. These high energy gamma-rays may be detected by IACTs such as the H.E.S.S. array of Imaging Atmospheric Cherenkov telescopes. Besides the popular targets such as the Galactic Center or the galaxy cluster as M87, dwarf Sphreroidal galaxies are privileged targets for searching a Dark Matter annihilation signal. H.E.S.S. observations on the Sagittarius dwarf galaxy are presented. The modelling of the Dark Matter halo profile of Sagittarius dwarf is discussed. Constraints on the velocity-weighted cross section of Dark Matter particles are derived in the framework of Supersymmetric and Kaluza-Klein models. The future searches with the incoming phase 2 of H.E.S.S. will be briefly discussed.
        Speaker: Emmanuel Moulin (H.E.S.S. Collaboration)
        Paper
        Slides
    • 14:00 16:00
      Theoretical Models (String Theory and Formal Aspects of SUSY) 1 Jordan Auditorium

      Jordan Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Dimensional Reduction Applied To Non-SUSY Theories 20m
        We consider regularization of a non-supersymmetric Yang-Mills theory by dimensional reduction (DRED). In particular, the anomalous dimensions of fermion masses and gauge coupling are computed to four-loop order. We put special emphasis on the treatment of evanescent couplings which appear when DRED is applied to non-supersymmetric theories. We highlight the importance of distinguishing between the evanescent and the real couplings. Considering the special case of a Super-Yang-Mills theory, we find that dimensional reduction is sufficient to preserve Supersymmetry in our calculations.
        Speaker: Mr Philipp Kant (Karlsruhe University)
        Minutes
        Slides
      • 14:20
        Lattice Formulation of Two Dimensional Topological Field Theory 20m
        We investigate an integrable property and observables of 2 dimensional N= (4,4) topological field theory defined on a discrete lattice by using the "orbifolding" and "deconstruction" methods. We show that our lattice model possesses the integrability and the partition function reduces to matrix integrals of scalar fields on sites in consequence. We make clear meaningful differences between the discrete lattice and differentiable manifold, which would be important to a study of topological quantities on the lattice. We also propose a new construction of N=(2,2) supersymmetric lattice theory, which is realized by a suitable truncation of scalar fields from the N=(4,4) theory.
        Speaker: Dr Tomohisa Takimi (Theoretical Physics Laboratory, The Institute of Physical and Chemical Research (RIKEN))
        Paper
        Slides
      • 14:40
        Graphical Representation of SUSY and Application to QFT 20m
        A graphical representation of supersymmetry is presented. It clearly expresses the chiral flow appearing in SUSY quantities, by representing spinors by directed lines (arrows). The chiral suffixes are expressed by the directions (up, down, left, right) of the arrows. The SL(2,C) invariants are represented by wedges. Both the Weyl spinor and the Majorana spinor are treated. We are free from the complicated symbols of spinor suffixes. The method is applied to the 5D supersymmetry. Many applications are expected. The result is suitable for coding a computer program and is highly expected to be applicable to various SUSY theories (including Supergravity) in various dimnesions.
        Speaker: Prof. Shoichi Ichinose (University of Shizuoka)
        Paper
        Slides
      • 15:00
        Supersymmetric three dimensional conformal sigma models 20m
        We construct novel conformal sigma models in three dimensions. Nonlinear sigma models in three dimensions are nonrenormalizable in perturbation theory. We use Wilsonian renormalization group equation method to find the fixed points. Existence of fixed points is extremely important in this approach to show the renormalizability. Conformal sigma models are defined as the fixed point theories of the Wilsonian renormalization group equation. The Wilsonian renormalization group equation with anomalous dimension coincides with the modified Ricci flow equation. The conformal sigma models are characterized by one parameter which corresponds to the anomalous dimension of the scalar fields. Any Einstein-K\"{a}hler manifold corresponds to a conformal field theory when the anomalous dimension is $\gamma=-1/2$. Furthermore, we investigate the properties of target spaces in detail for two dimensional case, and find the target space of the fixed point theory becomes compact or noncompact depending on the value of the anomalous dimension.
        Speaker: Dr Etsuko Itou (Kyoto University, YITP)
        Proceeding
        Slides
      • 15:20
        Supersymmetry with Ghosts 20m
        The role of higher derivative operators in 4D effective field theories is discussed in both non-supersymmetric and supersymmetric contexts. It is showed that theories with higher derivative operators do not always have an improved UV behaviour as usually considered, due to subtleties related to the analytical continuation from the Minkowski to the Euclidean metric. Radiative corrections in the presence of these operators are carefully considered. In the supersymmetric context of the O'Raifeartaigh model of spontaneous supersymmetry breaking with a higher derivative (supersymmetric) operator, it is found that quadratic divergences are nevertheless present in the one-loop self-energy of the scalar field. Similar conclusions apply to explict soft supersymmetry breaking (Wess-Zumino model) in the presence of these operators. These results depend, however, on the analytical continuation (Minkowski-Euclidean) that one has to make/choose and this is discussed to some detail. In both models, the UV logarithmic behaviour is restored in the decoupling limit of the associated ghosts. Based on arXiv:hep-th/0608094 and additional work in progress.
        Speaker: Dr Dumitru Ghilencea (University of Oxford, Physics Dept)
      • 15:40
        Reheating Metastable O'Raifeartaigh Models 20m
        In theories with multiple vacua, reheating to a temperature greater than the height of a barrier can stimulate transitions from a desirable metastable vacuum to a lower energy state. We discuss the constraints this places on various theories and demonstrate that in a class of supersymmetric models this transition does not occur even for arbitrarily high reheating temperature.
        Speaker: Nathaniel Craig (Stanford University)
        Slides
    • 16:00 16:30
      coffee break 30m Gaede-Foyer

      Gaede-Foyer

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
    • 16:30 18:30
      Alternatives 2 Small Auditorium B

      Small Auditorium B

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Searches for Extra Dimensions and for Heavy Resonances in Dilepton, Diphoton, Electron + Photon and Electron + Missing ET Final States with the D0 Detector 20m
        The high-mass spectrum of lepton and photon pairs is sensitive to a broad array of new physics. Examples are searches for extra dimensions in different models in the dielectron, dimuon, and diphoton channels, and Z´ bosons with Standard-Model-like couplings to fermions as well as in a variety of GUT- inspired models. A direct search for electron compositeness is possible in the production of excited electrons decaying into electron and photon. In addition, the electro (or muon) plus missing ET data sample can be searched for a W´ boson. We report on the latest results in searches in the high mass dielectron, dimuon, diphoton, electron plus photon, and electron plus missing ET channels obtained by the D0 experiment at the Tevatron, using a data set corresponding to an integrated luminosity of about 1 fb^-1, and in most cases substantially exceeding the reach of previous searches.
        Speaker: Carsten Magass (RWTH Aachen)
        Paper
        Slides
      • 16:50
        Precision constraints on warped scenarios with custodial protection 20m
        Randall-Sundrum scenarios offer a well-motivated alternative to supersymmetry as a solution to the hierarchy problem. In addition, bulk fermions allow for an interesting geometrical origin of the observed flavor hierarchies, as well as a natural suppression of neutral flavor changing effects. Recent progress has allowed to control potentially large contributions to the electroweak precision observables, and therefore lower the bounds on the new physics. I present the results of a global fit to the electroweak data in representative examples. Interestingly, loop effects select regions of parameter space with relatively light Kaluza-Klein resonances that can lead to an interesting phenomenology at the LHC.
        Speaker: Eduardo Ponton (Columbia University)
        Slides
      • 17:10
        New Tests for Sub-Gravitational Forces at Short Distances 20m
        Many theories beyond the Standard Model predict new particles that can mediate sub-gravitational strength forces at short distances. Recent advances in atom interferometry will allow a new round of experiments searching for sub- gravitational strength forces in the 1 micron to 100 meter length scales. I will describe the experiments and prospects for future improvements.
        Speaker: Prof. Jacob Wacker (SLAC)
        Slides
      • 17:30
        Sensitivity of the LHC Experiments to Extra Dimensions 20m
        In the late nineties several authors suggested that the extra dimensions predicted by string theory might lead to observable effects at high energy colliders. The ATLAS experiment which will start taking data at the LHC in 2007 will be an excellent place to search for such effects. A large set of models within the ADD or the Randall Sundrum geometries has been studied in ATLAS. These models predict a variety of signatures: jets and missing energy from direct graviton production, high mass tails in dilepton and diphoton production due to virtual graviton exchange, production of Kaluza-Klein excitations of standard model particles, etc. The sensitivity of ATLAS to these signatures will be presented.
        Speaker: Tracey Berry (Royal Holloway - University of London)
        Paper
        Slides
      • 17:50
        Gravitational Fixed Points and Virtual-Graviton Signals at LHC 20m
        LHC searches for extra-dimensional graviton signals suffer from a general problem: in addition to the fundamental Planck scale we have to introduce a cutoff (roughly of the order of the Planck scale) to compute collider effects. A slight misalignment between the Planck scale and this cutoff has huge effects for example on virtual-graviton observables. Starting completely generally from an ultraviolet fixed point as a minimal assumption on the theory of quantum gravity we show that the change in the anomalous dimension of the graviton propagator naturally regularizes LHC cross sections without any ad-hoc cutoff procedure. We quantify the effects of such a description on the rates and uncertainties for virtual-graviton signals at the LHC.
        Speaker: Tilman Plehn (University of Edinburgh)
        Paper
        Slides
      • 18:10
        Searches for New Physics in the Top Quark Samples at CDF 20m
        Twelve years after the discovery of the Top Quark at Fermilab's Tevatron, we are now finally beginning to shed light on this peculiarly massive quark. With the large datasets from CDF, we are able to probe the Standard Model top quark, and to search for signals of physics beyond the Standard Model. We present results of measurements of top quark properties, such as the charge of the top quark, top production mechanisms, the V-A nature of the couplings. We also search for flavor changing neutral currents in top decays, top decaying to charged higgs, a massive resonant state decaying to top quark pairs, and a new heavy top-like quark decaying to Wq.
        Speaker: Susana Cabrera Urban (Instituto de Fisica Corpuscular (IFIC) UV-CSIC)
        Paper
        Slides
    • 16:30 18:30
      Colliders - Higgs Phenomenology 2 (Theory) Small Auditorium A

      Small Auditorium A

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Heavy MSSM Higgs bosons at the LHC 20m
        We present new phenomenological analysis for the discovery of the heavy neutral MSSM Higgs bosons at the LHC. We analyze the search reach of the CMS experiment for the heavy neutral MSSM Higgs bosons with an integrated luminosity of 30 or 60 fb^-1. This is done by combining the latest results for the CMS experimental sensitivities based on full simulation studies with state-of-the-art theoretical predictions of MSSM Higgs-boson properties. This includes the the variation of the 5 sigma discovery contours in the MA-tan_beta plane with the variation of the SUSY parameters, as well as the precision that can be achieved for a measurement of the heavy neutral Higgs boson masses. It could be possible in favourable regions of the MSSM parameter space to experimentally resolve the signals of the two heavy MSSM Higgs bosons at the LHC. We furthermore present results for the discovery reach in diffractive Higgs production at the LHC. This will allow to probe interesting regions of the $\MA$--$\tb$ parameter plane of the MSSM with the Higgs bosons decaying to b \bar b.
        Speaker: Dr Sven Heinemeyer (IFCA, Santander)
        Paper
        Slides
      • 16:50
        MSSM Higgs-boson production in bottom-quark fusion: electroweak radiative corrections 20m
        Higgs-boson production in association with bottom quarks is an important discovery channel for supersymmetric Higgs particles at hadron colliders for large values of $\tan\beta$. We present the complete order $\alpha$ electroweak and order $\alpha_s$ strong corrections to Higgs production through bottom fusion in the MSSM and improve this next-to-leading-order prediction by known two-loop contributions to the Higgs self-energies, as provided by the program FeynHiggs. Choosing proper renormalization and input-parameter schemes, the bulk of the corrections (in particular the leading terms for large $\tan\beta)$ can be absorbed into an improved Born approximation. The remaining non-universal corrections are typically of the order of a few per cent. Numerical results are discussed for several benchmark scenarios like SPS 1b and SPS 4.
        Speaker: Dr Alexander Muck (RWTH Aachen)
        Paper
        Slides
      • 17:10
        Discovering the Higgs Bosons with Tau Leptons and a Bottom Quark 20m
        We investigate the prospects for the discovery at the CERN Large Hadron Collider of a neutral Higgs boson produced with one bottom quark followed by Higgs decay into a pair of tau leptons. We work within the framework of the minimal supersymmetric model. The dominant physics background from the production of $b\tau^+\tau^-$, $j\tau^+\tau^-$ ($j = g, u, d, s, c$), $b\bar{b}W^+W^-$, $W+2j$ and $b\bar{b}g$ is calculated with realistic acceptance cuts and efficiencies. Promising results are found for the CP-odd pseudoscalar ($A^0$) and the heavier CP-even scalar ($H^0$) Higgs bosons with masses up to 1 TeV.
        Speaker: Prof. Chung Kao (University of Oklahoma)
        Slides
      • 17:30
        Associated charged Higgs and W boson production in the MSSM at the CERN Large Hadron Collider 20m
        We investigate the viability of observing charged Higgs bosons (H^+) produced in association with W bosons at the CERN Large Hadron Collider, using the leptonic decay H^+ -> tau^+ nu_tau and hadronic W-decay, within different scenarios of the Minimal Supersymmetric Standard Model (MSSM) with both real and complex parameters. Performing a parton level study we show how the irreducible Standard Model background from W + 2 jets can be controlled by applying appropriate cuts and find that the size of a possible signal depends on the cuts needed to suppress QCD backgrounds and misidentifications. In the standard maximal mixing scenario of the MSSM we find a viable signal for large tan beta and intermediate H^+ masses (~ m_t) when using optimistic cuts whereas for more pessimistic ones we only find a viable signal for very large tan beta (> 50). We have also investigated a special class of MSSM scenarios with large mass-splittings among the heavy Higgs bosons where the cross-section can be resonantly enhanced by factors up to one hundred, with a strong dependence on the CP-violating phases. Even so we find that the signal after cuts remains small except for small masses (<= m_t) with optimistic cuts. Finally, in all the scenarios we have investigated we have only found small CP-asymmetries.
        Speaker: Dr Stefan Hesselbach (University of Southampton)
        Paper
        Slides
      • 17:50
        Charged Higgs production at the LHC in minimal flavor violation and beyond 20m
        The discovery of a charged-Higgs-boson would be a clear signal for physics beyond the Standard Model. In the usual LHC channels we only have realistic chances for such a discovery if the bottom-Yukawa coupling is enhanced. Supersymmetric flavor physics in general predicts squark mixing which can significantly change the pattern of charged-Higgs production and circumvent the chiral suppression for single Higgs production. The most severe constraints to these squark mixing parameters come from B physics. We evaluate the discovery potential of charged Higgs production in the light of supersymmetric flavor physics, in the single-Higgs production channel and in association with a hard jet.
        Speaker: Michael Spannowsky (LMU)
        Paper
        Slides
      • 18:10
        Decay of Charged Higgs boson in TeV scale supersymmetric seesaw model 20m
        In some class of supersymmetric models, the right-handed neutrino mass is given as a consequence of the supersymmetry (SUSY) breaking and its scale could be as low as TeV scale due to the Giudice-Masiero mechanism. A phenomenologically interesting feature of this scenario is an enhancement of a scalar trilinear interaction of Higgs- slepton-(right-handed) sneutrino. We study some phenomenological aspects of this scenario focusing on the scalar trilinear interaction. We show that the 1-loop correction by sneutrino exchange to the lightest Higgs boson mass destructively interferes with top-stop contributions in the minimal SUSY Standard Model. We find that a decay of charged Higgs boson into sneutrino and charged slepton is sizably enhanced and hence it gives rise to a distinctive signal at future collider experiments in some parameter space.
        Speaker: Dr Satoru Kaneko (IFIC, Valencia Univ.)
        Paper
    • 16:30 18:30
      Colliders - Susy Phenomenology 2 (Experiment) Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Chairperson: Dirk ZERWAS

      • 16:30
        Inclusive Search for Squark/Gluino Production at CDF 20m
        We present preliminary results on search for squarks and gluinos in proton-antiproton collisions at sqrt{s} = 1.96 TeV at Tevatron, based on 1.1 fb-1 of data collected by the CDF experiment in Run II. The search is performed on events with multiple jets and large missing transverse energy in the final state, within the framework of the Minimal Supersymmetric Standard Model and assuming that the R-parity is conserved. The measurement is compared to the Standard Model predictions and limits on the gluino and squark masses are extracted.
        Speaker: Monica D'Onofrio (Instituto de Fisica de Altas Energias (IFAE))
        Paper
        Slides
      • 16:50
        Searches for squarks and gluinos in Jets+Missing Transverse Energy Final states with the D0 Detector 20m
        Searches in the framework of R-parity conserving supergravity inspired models have been performed in data collected by the D\O\ detector at Tevatron $p\bar {p}$ collider at a center-of-mass energy of $\sqrt{s} = 1.96$~TeV. Topologies analyzed consist of acoplanar-jets and multijets events with large missing transverse energy in the final state. In the first search, generic squarks and gluinos productions were investigated in 1~fb$^{-1}$ of data. The data show good agreement with the standard model expectations and improved mass limits have been derived. Lower limits of 375~GeV and 289~GeV were derived at 95\% C.L on the squarks and gluino masses, respectively, with $\tan \beta = 3$, $A_0 = 0$ and $\mu < 0$. Previous limits obtained by D\O\ collaboration are improved by about 50~GeV. Supergravity inspired models suggest the existence of light supersymmetric partners of the third generation quarks: a light stop for moderate values of $\tan\beta$, a light sbottom for large $\tan\beta$. If the stop or sbottom is the next-to-lightest supersymmetric particle, the expected decay channels are $\tilde{t}\to c \tilde{\chi}^0_1$ and $\tilde{b}\to b\tilde{\chi}^0_1$, respectively, with $\tilde{\chi}^0_1$ assumed to be the lightest supersymmetric particle. Pair production of stops or sbottoms will therefore lead to the signature of two acoplanar heavy flavor jets and missing transverse energy. The searches for such final states are performed, improving significantly upon the results from Run I of the Tevatron.
        Speaker: Mansoora Shamim (Kansas State University)
        Paper
        Proceedings
        Slides
      • 17:10
        SUSY Searches in all-hadronic states with large MET at the LHC 20m
        The CMS search strategy for SUSY in inclusive multijet plus high missing transverse energy final states is reviewed. This canonical SUSY signature may be a viable discovery channel for low mass SUSY in the early phase of the LHC. Methods for direct normalization of Standard Model background estimates to the data, MET studies and filters for instrumental background will be presented.
        Speaker: Michael Tytgat
        Paper
        Slides
      • 17:30
        SUSY sensitivity in final states with leptons jets and MET at the LHC 20m
        Preparations are underway to search for possible signatures of Supersymmetry (SUSY) in the inclusive leptons plus jets and missing transverse energy (MET) as well as semi-inclusive topologies involving same-sign dimuon final states, using the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider, which are entering the final phases of construction and initial phases of commissioning. This talk reports on the expected performance of CMS, using a full simulation of the detector, and studies its effect on the SUSY discovery reach during early running at the LHC. The primary background sources to SUSY are expected to arise from QCD multijets, top anti-top, and W/Z production. Strategies for reducing and calibrating this background, both from the online CMS trigger and from offline data analysis, as well as understanding and controlling systematic uncertainties, are presented.
        Speaker: Massimiliano Chiorboli (Universita\)
        Paper
        Slides
      • 17:50
        Strategy for early SUSY searches at the LHC 20m
        We review the strategy for searching for R-parity conserving SUSY particles at the LHC. Results are focused on the early stage of collisions, and on the techniques for understanding the detector performance and estimating Standard Model backgrounds using first data. The measurement of kinematic quantities in the background region is used to estimate the total background in the kinematic region where a SUSY signal is expected. The significance of SUSY discovery for 10fb-1 is presented for the mSUGRA model by performing a grid scan on m1/2, m0, A, tanB and sgnmu.
        Speaker: Shimpei Yamamoto
        Paper
        Slides
      • 18:10
        Trigger strategy for SUSY searches at the LHC 20m
        A trigger strategy to be used for SUSY searches at the LHC is presented. We focus our attention on jets+missing ET triggers, but also investigate how other triggers can be used to effectively trigger SUSY events.
        Speaker: Antonella De Santo (Physics Department)
        Paper
        Slides
    • 16:30 18:30
      Cosmology 2 Lehmann-Auditorium

      Lehmann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Indirect searches for Dark Matter with AMS02 20m
        AMS02 is a multi-purpose spectrometer with superconducting magnet, designed for 3 years of data taking abroad the International Space Station. Its high performance regarding particle identification and energy measurement will allow performing indirect searches for dark matter (DM) in different channel simultaneously: gamma rays, positrons, antiprotons and hopefully antideuterons. A new spectrum generator, based on the public package micrOMEGAs is being developed for the computation of those signals. It includes cross section computations, dark halo modelling and charged particles Galactic propagation handle. This tool is presented, together with a novel method for the quantitative prediction of boost factors. These are expected to be caused by DM substructures, a specific class of which is considered. We show that DM spike formation around intermediate mass black holes can lead to dramatic enhancement of the signals. These studies allow to determine the AMS02 sensitivity to new physics, which is eventually presented.
        Speaker: Dr Pierre Brun (Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP))
        Paper
        Slides
      • 16:50
        The dark connection between the Canis Major dwarf, the Monoceros ring, the gas flaring, the rotation curve and the EGRET excess of diffuse Galactic Gamma Rays 20m
        The excess of diffuse galactic gamma rays above 1 GeV, as observed by the EGRET telescope on the NASA Compton Gamma Ray Observatory, shows all the key features from Dark Matter (DM) annihilation: 1) the energy spectrum of the excess is the same in all sky directions and is consistent with the gamma rays expected for the annihilation of WIMPs with a mass between 50-100 GeV; 2) the intensity distribution of the excess in the sky is used to determine the halo profile, which was found to correspond to the usual profile from N-body simulations with additional substructure in the form of two doughnut-shaped structures at radii of 4 and 13 kpc; 3) recent N-body similations of the tidal disruption of the Canis Major dwarf galaxy show that it is a perfect progenitor of the ringlike Monoceros tidal stream of stars at 13 kpc with ring parameters in perfect agreement of the EGRET data; 4) the mass of the outer ring is so large, that its gravitational effects influence both the gas flaring and the rotation curve of the Milky Way. Both effects are clearly observed in agreement with the DMA interpretation of the EGRET excess.
        Speaker: Prof. Wim De Boer (Institut fuer Experimentelle Kernphysik)
        Paper
        Slides
      • 17:10
        Supersymmetric Interpretation of the EGRET excess in diffuse Galactic gamma rays 20m
        Recently it was shown that the excess of diffuse Galactic gamma rays above 1 GeV could be interpreted as a Dark Matter annihilation signal. From the spectral shape of the excess it is possible to determine a range for the allowed WIMP mass which can be used to test the supersymmetric parameter space. It is found that the EGRET excess combined with electroweak and other constraints, e.g. relic denisity or direct detection limits, is fully consistent with the minimal mSUGRA model for scalars in the TeV range and gauginos below 500 GeV.
        Speaker: Dr Christian Sander (Univ. Hamburg)
        Paper
        Slides
      • 17:30
        Determination of the Dark Matter profile from the EGRET excess of diffuse Galactic gamma rays 20m
        The excess above 1 GeV in the energy spectrum of the diffuse galactic gamma radiation, measured with the EGRET experiment, can be interpreted as the annihilation of dark matter (DM) particles. The DM is distributed in a halo around the Milky Way. From the directionality of the gamma ray excess it is possible to determine the halo profile. A comparison is made between the theoretical preferred NFW profile with a DM cusp in the centre and a cored isothermal profile without cusp.
        Speaker: Mr Markus Weber (Institut fuer Experimentelle Kernphysik - Universitaet Karlsruhe)
        Paper
        Slides
      • 17:50
        Uncertainties of the antiproton flux from dark matter annihilation in comparison with the EGRET excess of diffuse gamma rays 20m
        The EGRET excess of diffuse Galactic gamma rays shows all the features expected from dark matter annihilation (DMA): a spectral shape given by the fragmentation of mono-energetic quarks, which is the same in all sky directions and an intensity distribution of the excess expected from a standard dark matter halo, predicted by the rotation curve. From the EGRET excess one can predict the flux of antiprotons from DMA. However, how many antiprotons arrive at the detector depends strongly on the propagation model. The simplest isotropic propagation models trap the anitprotons in the Galaxy, which leads to a local anitproton flux far above the observed flux. According to Bergstrom et al. this excludes the DMA interpretation of the EGRET excess. Here it is shown that more realistic anisotropic propagation models, in which most antiprotons escape by convection, are consistent with the B/C ratio, the antiproton flux and the EGRET excess from DMA.
        Speaker: Iris Gebauer (Universitaet Karlsruhe)
        Paper
        Slides
      • 18:10
        The anomaly in the cosmic ray positron spectrum 20m
        A recent analysis of cosmic ray data from a space borne experiment by the AMS collaboration confirms the excess in the cosmic ray positron spectrum observed by previous balloon experiments. The combination of the various experimental data establishes a deviation from the expected background with a significance of more than four standard deviations. The observed change in the spectral index cannot be explained without introducing a new source of positrons. If interpreted within the MSSM a consistent description of the antiproton spectrum, the diffuse gamma-ray flux and the positron fraction is obtained which is compatible with all other experimental data, including recent WMAP data. Constraints in the tan beta - M(neutralino) plane will be presented. Perspectives to observe the expected SUSY signatures at LHC, at direct detection experiments like XENON and at indirect detection experiments like PAMELA, AMS or PEBS will be discussed.
        Speaker: Dr Jan Olzem (I. Physikalisches Institut B, RWTH Aachen)
        Paper
        Slides
    • 16:30 18:30
      Theoretical Models (String Theory and Formal Aspects of SUSY) 2 Jordan Auditorium

      Jordan Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        See-saw neutrinos from string theory 20m
        We study the possibility of realizing the neutrino seesaw mechanism in the $\E8\times \E8$ heterotic string. In particular, we consider its $\Z6$ orbifold compactifications leading to the supersymmetric standard model gauge group and matter content. We find that these models possess all the necessary ingredients for the seesaw mechanism, including the required Dirac Yukawa couplings and large Majorana mass terms. We argue that this situation is quite common in heterotic orbifolds. In contrast to the conventional seesaw of grand unified theories (GUTs), no large GUT representations are needed to generate the Majorana mass terms.
        Speaker: Oleg Lebedev (Unknown)
        Slides
      • 16:50
        Exploring the landscape - statistics of string theory vacua 20m
        Recent progress in the statistical analysis of string theory vacua is summarised. In particular the classification of compactifications in type II orientifolds using intersecting brane constructions on different orbifold backgrounds is discussed. Results of this analysis include frequency distributions of gauge groups and chiral matter. Special attention is payed to models that contain the gauge group and the chiral matter of the MSSM.
        Speaker: Dr Florian Gmeiner (NIKHEF)
        Paper
        Slides
      • 17:10
        SUSY Multi-Step Unification without Doublet-Triplet Splitting 20m
        Matter-Higgs unification in string-inspired supersymmetric Grand Unified Theories predicts the existence of colored states in the Higgs multiplets and calls for two extra generations of Higgs-like fields ('unhiggses'). If these states are present near the TeV scale, gauge-coupling unification points to the existence of two distinct scales, 10^15 GeV where right-handed neutrinos and a Pati-Salam symmetry appear, and 10^18 GeV where complete unification is achieved. Baryon-number conservation, while not guaranteed, can naturally emerge from an underlying flavor symmetry. Collider signatures and dark-matter physics may be drastically different from the conventional MSSM.
        Speaker: Prof. Juergen Reuter (University of Freiburg)
        Paper
        Slides
      • 17:30
        Gauge coupling unification and Light Exotica in String Theory 20m
        In this letter we consider the consequences for the LHC of light vector-like exotica with fractional electric charge. It is shown that such states are found in orbifold constructions of the heterotic string. Moreover, these exotica are consistent with gauge coupling unification at one loop, even though they do not come in complete multiplets of SU(5). (Talk based on arXiv:0705.0294 [hep-ph])
        Speaker: Dr Akin Wingerter (Ohio State University)
        Paper
        Slides
      • 17:50
        Local SU(5) Unification in 6D from the Heterotic String 20m
        We present an orbifold compactification of the heterotic string which leads to a six-dimensional supergravity theory with the MSSM as the low-energy limit. Bulk and localised anomalies are cancelled by the Green-Schwarz mechanism. The model contains two pairs of inequivalent fixed points with gauge symmetries SU(5) and SU(2)xSU(4). The SU(5) fixed points contain one standard model generation each, while the third generation arises from bulk split multiplets, and the top Yukawa coupling is given by the six-dimensional gauge coupling. The model exhibits six-dimensional gauge-Higgs unification. All exotics are vector-like and can be consistently decoupled.
        Speaker: Dr Christoph Lüdeling (ITP, Uni Heidelberg)
        Paper
        Slides
      • 18:10
        GUT-like Superstring Standard Model from the Heterotic String 20m
        We construct a supersymmetric standard model in the context of the Z_{12-I} orbifold compactification of the E_8 x E_8' heterotic string theory. The gauge group is SU(3)_c x SU(2)_L x U(1)_Y x U(1)^4 x [SO(10) x U(1)^3]' with sin^2\theta_W^0 = 3/8. We obtain three families of SO(10) spinor-like chiral matter states, and Higgs doublets. All exotic states are exactly vector-like under the standard model gauge symmetry. There are numerous neutral singlets, many of which get VEVs such that only the standard model gauge symmetry survives and desired Yukawa couplings can be generated at lower energies . In particular, all vector-like exotic states achieve superheavy masses and the R-parity can be preserved.
        Speaker: Dr Bumseok Kyae (Korea Institute for Advanced Study (KIAS))
        Paper
        Slides
    • 19:30 20:00
      Picture of all participants in front of Karlsruhe Castle (Karlsruhe Castle)

      in front of Karlsruhe Castle

      Karlsruhe Castle

      Close to the physics building

      Picture of all participants in front of the castle

    • 20:00 23:00
      Welcome Banquet Badische Weinstube (Badische Weinstube)

      Badische Weinstube

      Badische Weinstube

      Click here
      for further information.

    • 09:00 10:30
      Plenary Session Gerthsen-Auditorium

      Gerthsen-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 09:00
        Status of the LHC 25m
        Speaker: Lyn Evans
        Slides
      • 09:30
        SUSY at the LHC (theory) 25m
        Speaker: Bhaskar Dutta
        Paper
        Slides
      • 10:00
        Higgs at the LHC (theory) 25m
        Speaker: Abdelhak Djouadi
        Slides
    • 10:30 11:00
      coffee break 30m Gaede-Foyer

      Gaede-Foyer

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
    • 11:00 12:30
      Plenary Session Gerthsen-Auditorium

      Gerthsen-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 11:00
        SUSY at the LHC (experimental) 25m
        Speaker: Maria Spiropulu
        Slides
      • 11:30
        Higgs at the LHC (experimental) 25m
        Speaker: Karl Jakobs
        Slides
      • 12:00
        SM backgrounds to SUSY searches 25m
        Speaker: Michelangelo Mangano
        Slides
    • 14:00 16:00
      Alternatives 3 Small Auditorium B

      Small Auditorium B

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Discovery Potential of LHC for Extended Gauge Symmetries 20m
        Many models of physics beyond the standard model are based on extended gauge symmetries and predict the existence of new heavy particles, often at the TeV scale. Such particles include heavy W and Z bosons, doubly charged higgses, heavy majorana neutrinos, leptoquarks and heavy fermions. The discovery potential of the ATLAS experiment, which will start taking data at the LHC in 2007, will be presented.
        Speaker: Gernot Krobath (Unknown)
        Paper
        Slides
      • 14:20
        Little Higgs Model Discrimination at the LHC and ILC 20m
        We propose a means to discriminate between the two basic variants of Little Higgs models, the Product Group and Simple Group models, at the next generation of colliders. It relies on a special coupling of light pseudoscalar particles present in Little Higgs models, the pseudo-axions, to the Z and the Higgs boson, which is present only in Simple Group models. We discuss the collider phenomenology of the pseudo-axion in the presence of such a coupling at the LHC, where resonant production and decay of either the Higgs or the pseudo-axion induced by that coupling can be observed for much of parameter space. The full allowed range of parameters, including regions where the observability is limited at the LHC, is covered by a future ILC, where double scalar production would be a golden channel to look for.
        Speaker: Prof. Juergen Reuter (University of Freiburg)
        Paper
        Slides
      • 14:40
        LFV in the Littlest Higgs Model with T-Parity: a Clear Distinction from SUSY 20m
        Little Higgs models offer an alternative way to the solution of the little hierarchy problem. Particularly interesting is the Littlest Higgs model with T-parity (LHT). We first briefly review earlier LHT calculations of flavour violation in the quark sector. The talk's main attention is paid to the analysis of the impact of the additional particles introduced in the framework of the LHT on a wide array of lepton flavour violating (LFV) decays. These include the decays $\ell_i\rightarrow\ell_j\gamma$, $\tau\rightarrow\ell\pi,\eta,\eta^\prime$, $\mu^-\rightarrow e^-e^+e^-$, the six three body leptonic decays $\tau^-\rightarrow\ell_i^-\ell_j^+\ell_k^-$ and the rate for $\mu-e$ conversion in nuclei. Upper bounds for the LFV decays in question are given. Finally, we point out how parameter independent ratios of branching ratios of LFV decays can be used to distinguish the LHT from SUSY at low energy experiments.
        Speaker: Mr Bjoern Duling (Technische Universität München, Physikdepartment)
        Paper
        Slides
      • 15:00
        Topological physics of little higgs bosons 20m
        Topological interactions will generally occur in composite Higgs or Little Higgs theories, extra-dimensional gauge theories in which A_5 plays the role of a Higgs boson, and amongst the pNGB's of technicolor. This phenomena arises from the chiral and anomaly structure of the underlying UV completion theory, and/or through chiral delocalization in higher dimensions. These effects are described by a full Wess-Zumino-Witten term involving gauge fields and pNGB's. We give a general discussion of these interactions, some of which may have novel signatures at future colliders, such as the LHC and ILC.
        Speaker: Hill Richard (Fermilab)
        Paper
        Slides
      • 15:20
        One-loop Radiative Corrections to the $\rho$ Parameter 20m
        We implement a one-loop analysis of the $\rho$ parameter in the Left Right Twin Higgs model, including the logarithmically enhanced contributions from both fermion and scalar loops. Numerical results show that the one-loop contributions are dominant over the tree level corrections in most regions of parameter space. The experimentally allowed values of $\rho$-parameter divide the allowed parameter space into two regions; less than $670~{\rm GeV}$ and larger than $1100~{\rm GeV}$ roughly, for symmetry breaking scale $f$. Our numerical analysis significantly reduces the parameter space which are favorably accessible to the LHC.
        Speaker: Dr Dong-Won Jung (Korea Institute of Advanced Study ( KIAS))
        Paper
        Slides
      • 15:40
        Physics of the pseudo-Goldstone higgs from five dimensions 20m
        I will discuss models of electroweak symmetry breaking with the higgs field embedded in a 5D gauge field. I will concentrate on the relation between the 5D geometry and various phenomenological aspects of the model: 1) Electroweak precision observables, 2) Strong WW scattering, 3) Fine-tuning of electroweak breaking.
        Speaker: Adam Falkowski (CERN)
        Paper
    • 14:00 16:00
      Colliders - Higgs Phenomenology 3 (Experiment) Small Auditorium A

      Small Auditorium A

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Search for supersymmetric charged Higgs bosons at the Tevatron 20m
        Speaker: Gerald Grenier (Institut de Physique Nucleaire de Lyon (IPNL))
        Paper
        Slides
      • 14:20
        Search for single top production at CDF 20m
        In proton-antiproton collisions at the Tevatron top quarks are predominantly pair-produced via the strong interaction. However, the standard model of particle physics also predicts the production of single top-quarks via electroweak processes where an off-mass-shell W boson is exchanged either in the s-channel or the t-channel. Once a signal is established the single-top cross section will serve as an input to tests of the unitarity of the CKM mixing matrix. It is a major challenge to distinguish the single top signal from significant backgrounds, mainly W production in association with heavy flavour jets. The CDF collaboration has analyzed a Tevatron Run II dataset corresponding to 1 fb^{-1} of integrated luminosity. Advanced analysis techniques including neural networks, matrix elements and likelihood discriminants are employed to search for the tiny single-top signal. The results of these multivariate searches will be presented. Single-Top analyses are an improtant stepping stone for the Higgs boson search in the WH channel, since the two processes have the same experimental signature. Understanding the background rates and background composition in the W+jets sample using single-top techniques will be a prerequiste for a successful WH analysis. The talk will summarize the lessons learned by the single-top analyses and point to their application in the WH search.
        Speaker: Dominic Hirschbuehl (KIT)
        Paper
        Slides
      • 14:40
        Discovery potential for the SM Higgs boson in exclusive final states 30m
        ATLAS and CMS results.
        Speaker: Sandra Horvat (Max-Planck-Institut fur Physik)
        Slides
      • 15:10
        Discovery potential for the SM Higgs boson in the inclusive search channels 30m
        ATLAS and CMS results
        Speaker: Mr Alexander Schmidt (Universitaet Karlsruhe, EKP)
        Paper
        Slides
      • 15:40
        Search for Neutral Higgs Bosons in MSSM-like topologies 20m
        ATLAS and CMS results.
        Speaker: Klute Markus (MIT)
        Slides
    • 14:00 16:00
      Colliders - Susy Phenomenology 3 (Theory) Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Chairperson: Werner POROD

      • 14:00
        Electroweak Contributions to Squark Pair Production 20m
        We study pair production of first and second generation squarks in pp collisions at the LHC. In addition to the well-known SUSY QCD diagrams, we compute the contributions from the exchange of an electroweak gauge boson or gaugino. The dominant effect is due to the interference between electroweak gaugino and gluino exchange diagrams, and leads to an enhancement of the total cross section that can be larger than that due to NLO QCD corrections.
        Speaker: Sascha Bornhauser (University of Bonn)
        Paper
        Slides
      • 14:20
        EW Corrections to Pair Production of Top-squarks at the LHC 20m
        At hadron colliders, supersymmetric particles are expected to be produced abundantly in pairs via strong interactions. In this context, top-squark is of particular interest as a candidate on the lightest squark within many supersymmetric models. Given the expected experimental precision, detailed theoretical predictions are essential. We present the complete electroweak (EW) corrections to the top-squark pair production cross section within MSSM at LHC energies. We show that even though EW contributions are small for total cross sections, they become sizeable for differential cross section distributions with respect to transverse momentum, $p_T$, and invariant mass, $\sqrt{\hat{s}}$, of the top-squarks for high $p_T$ and high $\sqrt{\hat{s}}$ ranges.
        Speaker: Monika Kollar (MPI for physics, Munich)
        Paper
        Slides
      • 14:40
        One-loop corrections in chargino sector with CPV phases 20m
        We present analysis of production and decay of charginos in MSSM at the one-loop level. Radiative corrections in this sector can be of the order of 20%, so they should be taken into account in future experiments. Moreover, there are several effects that can be observed in chargino sector which are only present beyond the leading order. Particular emphasis will be put on the contributions due to CP violating phases of the MSSM.
        Speaker: Mr Krzysztof Rolbiecki (Institute of Theoretical Physics, Warsaw University)
        Paper
        Slides
      • 15:00
        Transverse-momentum, threshold and joint resummations for slepton-pair production at hadron colliders 20m
        We present a first and extensive study of resummation effects for supersymmetric particle production at hadron colliders, focusing on Drell-Yan like slepton-pair and slepton-sneutrino associated production. We jointly treat the recoil corrections at small transverse-momentum and the threshold-enhanced contributions near the partonic threshold, allowing a complete understanding of the soft-gluon effects in differential distributions for slepton-pair production at hadron colliders. We show resummed transverse-momentum and invariant-mass distributions and compare them with the traditional transverse-momentum and threshold resummation formalisms as well as with fixed-order perturbative calculations.
        Speaker: Benjamin Fuks (LPSC Grenoble)
        Paper
        Slides
      • 15:20
        Multiparticle SUSY simulations at LHC & ILC: Off-Shell effects, interferences and radiative corrections 20m
        The interesting but difficult phenomenology of supersymmetric models at the LHC & ILC demands a corresponding complexity and maturity from simulation tools. This includes multi-particle final states, reducible and irreducible backgrounds, spin correlations, real emission of photons and gluons, virtual corrections etc. Most of these topics are included in the multi-particle Monte Carlo (MC) Event generators Madgraph, Whizard and Sherpa. A comparison of these codes is shown, with a special focus on the new release of Whizard/O'Mega. I show examples for the necessity of considering full matrix elements with all off-shell effects and interferences for multi-particle final states in supersymmetric models and give a status report on ongoing projects for simulations of SUSY processes at the LHC with these codes, including all of the abovementioned corrections.
        Speaker: Prof. Juergen Reuter (University of Freiburg)
        Paper
        Slides
    • 14:00 16:00
      Cosmology 3 Lehmann-Auditorium

      Lehmann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        A Dark Matter Tool on the Web 20m
        Evidences for Dark Matter existence have been increasingly compeling. Current and future direct and indirect searches and results from LHC will provide a wealth of new constraints on the nature of Dark Matter. A web page initiated by the ILIAS network has been set-up to provide the community with a developping tool to evaluate the sensitivities and complementarities of different experiments under different assumptions, theoretical and experimental. The status of this tool will be presented and examples of analysis shown.
        Speaker: Dr Rachid LEMRANI (CEA/DAPNIA/SPP)
        Slides
      • 14:20
        Determining the WIMP Mass from Direct Dark Matter Detection Data 20m
        Weakly interacting massive particles (WIMPs) are one of the leading candidates for Dark Matter. Currently, the most promising method to detect many different WIMP candidates is the direct detection of the recoil energy deposited in a low- background laboratory detector due to elastic WIMP-nucleus scattering. So far the usual procedure has been to predict the event rate of direct detection of WIMPs based on some model(s) of the Galactic halo from cosmology and of WIMPs from the elementary particle physics. This can be used to e.g. estimate the mass of halo WIMPs only by fitting the predicted recoil spectra to future experimental data. Now we develop a model-independent method to determine the WIMP mass by directly using experimental data (i.e., the recoil energies) of direct detection. This method is independent of the as yet known WIMP density near the Earth as well as of the WIMP-nuclear cross section. Moreover, according to our simulations, we can already get meaningful information about the WIMP mass from less than one hundred events.
        Speaker: Mr Chung-Lin Shan (Physikalisches Inst. der Univ. Bonn)
        Paper
        Slides
      • 14:40
        Status of the EDELWEISS-2 Dark Matter Search 20m
        The Edelweiss programme is dedicated to the direct search for Dark Matter as massive weakly interacting particles (WIMPs) with Germanium cryogenic detectors operated in the Laboratoire Souterrain de Modane in the French Alps at a depth of 4800 mwe. After the initial phase Edelweiss I, which involved a total mass of 1 kg, the second step of the programme, Edelweiss II, currently involves 9 kg of detectors and an active shielding of 100m2 muon veto detectors and is now in its commissioning phase. The current status and performance of the Edelweiss II set-up in terms of backgrounds will be given, the underground muon flux measured with the muon veto system will be presented.
        Speaker: Ms Astrid Chantelauze (Institut für Kernphysik - Forschungszentrum Karlsruhe)
        Paper
        Slides
      • 15:00
        New results from the XENON10 direct dark matter search 20m
        The XENON10 experiment is a search for Weakly Interacting Massive Particles (WIMPs), a leading candidate for the dark matter content of the Universe. The XENON10 detector uses the simultaneous measurement of ionization and scintillation in liquid xenon to distinguish between nuclear recoils and background electronic interactions. Ionization electrons are extracted into the xenon vapor where they produce a large proportional scintillation signal in a grid assembly. Both prompt and proportional scintillation light are detected by PMT arrays on the top and bottom of the active liquid xenon volume. The distribution of proportional scintillation light in the top PMT array can be used to achieve xy position resolution, while the ionization drift time gives position resolution in the z direction. This allows the definition of a low-background fiducial volume. XENON10 was installed in the underground Gran Sasso National Laboratory in Italy in March 2006, and a blind analysis was performed on low-background data acquired between November 2006 and February 2007. I will present the results of that analysis, which has the allowed the most sensitive limit to date on the spin-independent WIMP-nucleon scattering cross-section. I will also describe the current plans for XENON10, as well as future dark matter experiments using the same technology.
        Speaker: Prof. Daniel McKinsey (Yale University)
        Slides
      • 15:20
        LUX: A Large Two-phase Liquid Xenon Detector for WIMP Search 20m
        LUX is a new collaboration which has proposed a 100 Kg (fiducial) Liquid Xenon two-phase TPC detector for WIMP search. I will describe the detector, present simulations and comment on the sensitivity that can be achieved. Critical pieces of the detector are under construction and we will have an engineering run (above ground) in the Fall of 2007. The full detector, expected to be the most sensitive at that time, should start operations in an underground lab in mid 2009.
        Speaker: Prof. Mani Tripathi (UC Davis)
        Slides
      • 15:40
        Systematics and background suppression in the KATRIN experiment 20m
        Despite the results of neutrino oscillation experiments providing compelling evidence for non-zero neutrino masses, the absolute mass scale still remains undetermined. This question, which has a strong impact on both particle physics and cosmology, can be addressed in several, complementary ways, either via astrophysical observations or by laboratory experiments. The direct neutrino mass determination relies on a precise measurement of the $\beta$ spectrum (tritium, $^{187}\textrm{Re}$) near its endpoint region. Recent experiments at Mainz and Troitsk using tritium $\beta$ decay have reached their sensitivity potential, yielding upper limits of about $\unit[2]{eV/c^2}$ for $m(\overline{\nu}_e)$. The {\bf KA}rlsruhe {\bf TRI}tium {\bf N}eutrino ex\-peri\-ment (KATRIN), designed to reach a sensitivity of $m(\overline{\nu}_e) = \unit[0.2]{eV/c^2}$ (90\% C.L.), will improve the signal rate by a factor of $> 100$ with respect to previous experiments while maintaining the same low background level at an enhanced energy resolution of 0.93~eV of the spectrometer which is scaled up by a factor of 10 in linear dimensions. This low background rate can only be achieved by active and passive reduction of the background components induced by the spectrometer itself and in the detector region. Furthermore, sources of systematic errors such as energy losses inside the tritium source or fluctuations of the energy scale of the spectrometer need to be carefully controlled and analyzed. An overview of KATRIN`s method to reduce the background rate and to determine the systematics as well as the sensitivity on the neutrino mass will be presented.
        Speaker: Kathrin Valerius (Institut für Kernphysik, WWU Münster)
        Paper
        Slides
    • 14:00 16:00
      Flavor Physics 1 Eiermann-Auditorium

      Eiermann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Tau decays at the B-Factories 20m
        We present recent results on tau decays using data collected by the BaBar detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. We report measurements of rates for several hadronic decays and searches for lepton flavor violation.
        Speaker: Sanjay Swain
        Slides
      • 14:20
        The muon magnetic moment and supersymmetry 20m
        Very impressive recent developments have led to an unprecedented precision in the experimental value and the Standard Model prediction of the muon magnetic moment (g-2). A discrepancy of more than 3 sigma between SM and experiment has now been definitely established! This discrepancy constitutes a strong hint for supersymmetry at the weak scale, and it leads to significant bounds on the supersymmetry parameter space. In the talk the developments leading to the 3 sigma discrepancy are reviewed, and it is shown that this discrepancy can be easily explained by supersymmetry effects but not by virtually any other model of physics beyond the SM. Furthermore, it is shown that the bounds on supersymmetry parameters derived from (g-2) are complementary to information that can be obtained at the LHC.
        Speaker: Dr Dominik Stockinger (University Glasgow)
        Paper
      • 14:40
        Lepton Universality breaking as a Probe of New Physics 20m
        Deviations from the Standard Model (SM) expectations of the Lepton Universality (LU) breaking represent a powerful tool to test the SM and, hence, to probe New Physics (NP) effects. Kaon and pion physics are obvious grounds where to perform such tests, for instance in the pi->l nu and K-> l nu decays, where l= e,mu. Supersymmetric (SUSY) extensions of the SM can exhibit mu-e non-universal contributions at an experimental visible level. We also discuss the LU breaking in B-physics sistems as well as in leptonic tau decays.
        Speaker: Paride Paradisi (Universitat of Valencia and IFIC)
        Slides
      • 15:00
        Lepton Flavour Violation in the SUSY-SeeSaw, an update 20m
        We study several Lepton Flavour Violating processes in the context of the SUSY seesaw model with three right handed neutrinos. We estimate rates for l_j-->l_i\gamma, l_j-->3l_i, tau--> mu+hadrons and mu-e conversion in nuclei. We compare these estimates with the present and future experimental bounds.
        Speaker: Herrero Maria J. (Universidad Autonoma de Madrid)
        Paper
        Slides
      • 15:20
        Lepton Flavor Violation at the LHC 20m
        We study lepton flavor violating processes at the LHC in context of the seesaw mechanism in mSUGRA. The present knowledge in the neutrino sector as well as improved future measurements are taken into account. We investigate the correlations of these processes with the corresponding lepton flavor violating rare decays such as mu->egamma. It is shown that these correlations are relatively weakly affected by uncertainties in the neutrino data, but very sensitive to the mSUGRA parameters.
        Speaker: Dr Frank Deppisch (DESY-Hamburg)
        Paper
        Slides
      • 15:40
        Bounds on R-parity violating supersymmetric couplings from leptonic and semi-leptonic meson decays 20m
        We present a comprehensive update of the bounds on $R$--Parity violating supersymmetric couplings from lepton--flavor-- and lepton--number--violating decay processes. We consider ${\tau}$ and ${\mu}$ decays as well as leptonic and semi--leptonic decays of mesons. We present several new bounds resulting from ${\tau}$, ${\eta}$ and Kaon decays and correct some results in the literature concerning $B$ meson decays.
        Speaker: Ben O'Leary (RWTH-Aachen)
        Slides
    • 16:00 16:30
      coffee break 30m Gaede-Foyer

      Gaede-Foyer

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
    • 16:30 18:30
      Alternatives 4 Small Auditorium B

      Small Auditorium B

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Is the Higgs boson elementary or composite? 20m
        As a way to extend the naturalness domain of the Standard Model, we enlarge the symmetry of the top-Higgs sector to a softly broken SO(5). Depending on its parameters, the model can either be viewed as describing a perturbatively coupled Higgs boson or as the low energy description of a strongly coupled theory at the naturalness cutoff. We perform the ElectroWeak Precision Test (EWPT) analysis, taking into account the important contribution of new fermionic states to the T parameter. To estimate the contribution to the S parameter from the cutoff, and to appreciate the dual role of the model, we also consider the properties of its "holographic" and "deconstructed holographic" extensions. It is unlikely that these attempts at UV completion fare significantly better than the minimal setup with respect to the EWPT and naturalness.
        Speaker: Vyacheslav Rychkov (Scuola Normale Superiore)
        Slides
      • 16:50
        The S-parameter in Holographic Technicolor Models 20m
        We study the S parameter, considering especially its sign, in models of electroweak symmetry breaking (EWSB) in extra dimensions, with fermions localized near the UV brane. Such models are conjectured to be dual to 4D strong dynamics triggering EWSB. The motivation for such a study is that a negative value of S can significantly ameliorate the constraints from electroweak precision data on these models, allowing lower mass scales (TeV or below) for the new particles and leading to easier discovery at the LHC. We first extend an earlier proof of S>0 for EWSB by boundary conditions in arbitrary metric to the case of general kinetic functions for the gauge fields or arbitrary kinetic mixing. We then consider EWSB in the bulk by a Higgs VEV showing that S is positive for arbitrary metric and Higgs profile, assuming that the effects from higher-dimensional operators in the 5D theory are sub-leading and can therefore be neglected. For the specific case of AdS_5 with a power law Higgs profile, we also show that S ~ + O(1), including effects of possible kinetic mixing from higher-dimensional operator (of NDA size) in the 5D theory. Therefore, our work strongly suggests that S is positive in calculable models in extra dimensions.
        Speaker: Mr Matthew Reece (Cornell University, Laboratory for Elementary Particle Physics)
        Slides
      • 17:10
        Minimal Walking Technicolor for Colliders 20m
        I will present recent models of dynamical breaking of the electroweak theory, i.e. Minimal Walking Technicolor. I will focus on relevant collider phenomenology.
        Speaker: Mads Toudal Frandsen (University of Kopenhagen)
        Paper
        Slides
      • 17:30
        Collider Phenomenology of Higgsless models 20m
        We study the LHC signatures of new gauge bosons in the minimal deconstruction Higgsless model with 3 lattice sites (TSM). It predicts an extra pair of W' and Z' bosons which can be as light as 400 GeV while consistent with all existing precision data. We analyze the W' and Z' signals at the LHC including the complete electroweak and QCD backgrounds and that LHC can essentially cover the complete parameter space of the three site model.
        Speaker: Dr Alexander Belyaev (Southampton University - Rutherford Lab)
        Paper
        Slides
      • 17:50
        Electroweak Symmetry Breaking without Higgs Bosons at LHC 20m
        While the Brout-Englert-Higgs model of electroweak symmetry breaking is the best studied scenario, a number of alternative models exist, predicting new signatures. The ATLAS experiment will start data taking at the LHC in 2007 and will search for evidence for such models. This includes studies of vector boson scattering and searches for the production of particles predicted in technicolor models. Studies of the sensitivity of the experiment to such models will be presented.
        Speaker: Pierre-Antoine Delsart (Physique experimentale des particules)
        Slides
      • 18:10
        Black Holes and ADD gravitons at the LHC 20m
        One of the consequences of large extra dimensions is the production of microscopic black holes at LHC energies. If the effective Planck sclae is at the TeV scale the black hole production cross section is in the picobarn range. We present results of a multiobject BH analysis at CMS: for effective Planck scale up to 3 TeV a 5-sigma reach can be obtained with up to 100 pb-1. We also present results for direct graviton emission in the MET+photon final state. summary
        Speaker: Sezen Sekmen (Physics Department - Middle East Technical University (METU))
        Slides
    • 16:30 18:30
      Colliders - Higgs Phenomenology 4 (Theory) Small Auditorium A

      Small Auditorium A

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Higgs boson decays in the Complex MSSM 20m
        The analysis of the LEP results showed that, in parts of the MSSM parameter space with non-zero complex phases, it's possible that a Higgs boson could have been as light as 40 GeV and yet still have escaped detection. This region is dominated by the Higgs cascade decay (h2 -> h1 + h1, where h1 is the lightest and h2 is the second lightest neutral Higgs boson respectively). Full 1-loop results for this vertex are presented and combined with 2-loop Higgs propagator corrections from the program FeynHiggs. It is shown that, in this region of parameter space, these new vertex corrections can increase the decay width by a factor of 50.
        Speaker: Ms Karina Williams (IPPP, Physics Department, University of Durham)
        Paper
        Slides
      • 16:50
        Higgs production and decay in SUSY with CP violation 20m
        In SUSY models with CP violation the production cross sections and decay branching ratios of Higgs bosons may strongly depend on the new CP-violating phases which has to be taken into account in the Higgs search at LHC. In the MSSM with explicit CP violation we analyze the phase dependence of the di-photon decay channel of neutral Higgs bosons, which is an important detection channel for light Higgs bosons at the LHC, at lowest order of the Higgs-sparticle couplings. Complementary to previous studies we focus on SUSY scenarios with low mass sparticle spectrum where the contributions of the sparticles in the loops can have a significant impact on the branching ratio (BR). In some regions of the MSSM parameter space the BR can vary by more than one order of magnitude with the SUSY CP phases. Also in the NMSSM with an additional singlet/singlino superfield, where CP violation results in the mixing of all five neutral Higgs eigenstates, the new CP violating phases can have strong implications on the Higgs phenomenology.
        Speaker: Dr Stefan Hesselbach (University of Southampton)
        Paper
        Slides
      • 17:10
        The Higgs sector in the MSSM with CP-phases at higher orders 20m
        Higher order corrections in the MSSM with non-vanishing CP-phases can induce mixing between the CP-even and the CP-odd states. In particular, the lightest Higgs boson is not purely CP-even but receives a CP-odd component. Results are presented for the leading two-loop contributions of O(alpha_t alpha_s) to the masses and mixing effects in the Higgs sector of the MSSM with non-vanishing CP-phases. They are derived in the Feynman-diagrammatic approach using on-shell renormalization.
        Speaker: Dr Heidi Rzehak (Paul-Scherrer-Institut, Villigen PSI, Switzerland)
        Paper
        Slides
      • 17:30
        Higgs Masses in the Complex MSSM with FeynHiggs 20m
        FeynHiggs is a program for the computation of Higgs-boson masses and mixings in the complex MSSM. It also supplies derived information such as Higgs branching ratios and production cross-sections. This talk will review the latest version 2.6 and focus in particular on the implementation of the Higgs mixing in the presence of complex phases.
        Speaker: Dr Thomas Hahn (MPI Munich)
        Paper
        Slides
      • 17:50
        Higgs-Boson Phenomenology in the NUHM 20m
        We investigate the Higgs phenomenology in the non-universal Higgs model (NUHM). Assuming that the lightest supersymmetric particle (LSP) provides the cold dark matter density preferred by WMAP and other cosmological data, we define MA-tan_beta planes that are also in agreement with electroweak precision observables and B physics observables. Within these planes we analyze the bounds obtained at LEP, the reach of the Tevatron and the LHC, as well as the precisions for various Higgs related observables that can be achieved at the LHC. The compatibility of the model with recent Tevatron measurements is briefly discussed.
        Speakers: Dr Georg Weiglein (IPPP, Durham) , Dr Sven Heinemeyer (IFCA, Santander)
        Paper
        Slides
      • 18:10
        Light MSSM Higgs boson scenario and its test at hadron colliders 20m
        In the Minimal Supersymmetric Standard Model, the possibility for the lightest CP-even Higgs boson to be lighter than Z-boson (as low as about 60 GeV) is, contrary to the usual belief, is not yet excluded by LEP2 data or any other existing experimental data. This Light Higgs boson scenario (LHS) is characterized by suppressed ZZh coupling and the decay branching ratio Br(h/A-> bb) as a result of generic supersymmetric loop corrections. Consequently, the (W+ H- h) coupling has to be large due to the sum rule of Higgs couplings to weak gauge bosons. We demonstrate that the associate neutral and charged Higgs boson production process, pp -> H+ h (A), can completely probe LHS at the CERN Large Hadron Collider and discuss additional reactions and potential o B-factories for complementary probe of the Light Higgs Scenario.
        Speaker: Dr Alexander Belyaev (Southampton University - Rutherford Lab)
        Paper
        Slides
    • 16:30 18:30
      Colliders - Susy Phenomenology 4 (Experiment) Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Chairperson: Darin ACOSTA

      • 16:30
        Results of searches for Leptoquarks, Isolated Leptons and Multileptons at HERA 40m
        Results of searches for Leptoquarks, Isolated Leptons and Multileptons with the H1 and ZEUS experiments in ep collisions at HERA are presented. The analyses use the full statistics of HERA high energy running which ended in March 2007. Combined results of both experiments based on a total integrated luminosity of about 1 fb-1 are also shown.
        Speaker: Dr Judith Katzy (DESY, HAMBURG)
      • 17:10
        Search for scalar top admixture in the $t\bar{t}\rightarrow\ell+$jets channel with the D0 detector 20m
        We report on a search for scalar top quark pair production in the lepton+jets channel. Just like Standard Model top quarks, scalar top quarks are produced in pairs in proton-antiproton collisions. One of the preferred scenarios is for the scalar top to decay to a b-quark and a chargino, with the chargino subsequently decaying into a real or virtual W boson and a neutralino. The neutralino escapes without being detected. Thus, the final state signature can be a lepton, two b-jets, two light quark jets and missing transverse energy, which is identical to the signature of Standard Model $t\bar{t}$ production. We use the kinematic differences between the exotic and the Standard Model scenarios to separate the two.
        Speaker: Su-Jung Park (University of Rochester)
        Paper
        Slides
      • 17:30
        Search for the Associated Production of Charginos and Neutralinos with the D0 detector 20m
        A search for associated production of charginos and neutralinos is performed using data recorded with the D0 detector at a p-pbar center-of-mass energy of 1.96 TeV at the Fermilab Tevatron Collider. This analysis considers final states with missing transverse energy and three leptons, including hadronic decays of tau leptons. With more than 2fb-1 of data recorded by the D0 experiment, the expected sensitivity reaches well beyond existing limits on the chargino mass, in particular in regions of parameter space with enhanced leptonic branching fractions.
        Speaker: Olav Mundal (Bonn University)
        Paper
        Slides
      • 17:50
        Search for Chargino-Neutralino Pairs at CDF 20m
        We present the results of a search for associated production of the lightest chargino and next-to-lightest neutralino using 1fb-1 of sqrt s = 1.96 TeV ppbar data collected with the CDF detector at the Tevatron. We combine the results of several multi-lepton final states to set upper limits on the cross section times branching ratio for chargino-neutralino production as a function of the chargino mass.
        Speaker: Else Lytken (Conseil Europeen Recherche Nucl. (CERN))
        Paper
        Slides
      • 18:10
        SUSY searches in trilepton final states at the LHC 20m
        he direct production of neutralino-chargino pairs in the mSUGRA scenario with decays to a pure trilepton final state has a significant cross section at low neutralino masses and is a viable SUSY discovery channel at the LHC. The main Standard Model background are from Z/gamma + jets, WZ/gamma and ttbar channels where dileptons appear from Z decays and a third lepton is coming either from W decay or jets. The large total and missing transverse energy of the event used for other SUSY channels is not efficient for the direct production of low mass gauginos thus making isolation and identification of fake leptons a major task for the trilepton signature. We evaluate signal selection criteria using the CMS detector simulation. A 5 sigma signal can be observed in the opposite sign same flavor dilepton invariant mass at an integrated luminosity above 10 fb-1 for m(1/2) < 170 GeV.
        Speaker: Martin Niegel (Institut fuer Experimentelle Kernphysik)
        Slides
    • 16:30 18:30
      Cosmology 4 Lehmann-Auditorium

      Lehmann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Constraints on the very early universe from WIMP dark matter 20m
        We investigate the relic density n_\chi of non-relativistic long-lived or stable particles \chi in non-standard cosmological scenarios. We calculate the relic abundance starting from arbitrary initial temperatures of the radiation- dominated epoch, and derive the lower bound on the initial temperature T_0 \geq m_\chi/23, assuming that thermally produced \chi particles account for the dark matter energy density in the universe; this bound holds for all \chi annihilation cross sections. We also investigate cosmological scenarios with modified expansion rate. Even in this case an approximate formula similar to the standard one is capable of predicting the final relic abundance correctly. Choosing the \chi annihilation cross section such that the observed cold dark matter abundance is reproduced in standard cosmology, we constrain possible modifications of the expansion rate at T \sim m_\chi/20, well before Big Bang nucleosynthesis.
        Speaker: Dr Mitsuru Kakizaki (Physics Institute, Bonn University)
        Slides
      • 16:50
        Phenomenology of sub-GUT Supersymmetry Breaking 20m
        We study models in which supersymmetry breaking appears at an intermediate scale, M_{in}, below the GUT scale. We assume that the soft supersymmetry-breaking parameters of the MSSM are universal at M_{in}, and study the morphology of the constraints from cosmology and collider experiments on the allowed regions of parameter space as M_{in} is reduced from the GUT scale. We present separate analyses of the (m_{1/2},m_0) planes for tan(beta)=10 and tan(beta)=50, as well as a discussion of non-zero trilinear couplings, A_0. We demand that the lightest neutralino be the LSP, and that the relic neutralino density not conflict with measurements by WMAP and other observations. At moderate values of M_{in}, we find that the allowed regions of the (m_{1/2},m_0) plane are squeezed by the requirements of electroweak symmetry breaking and that the lightest neutralino be the LSP, whereas the constraint on the relic density is less severe. At very low M_{in}, the electroweak vacuum conditions become the dominant constraint, and a secondary source of astrophysical cold dark matter would be necessary to explain the measured relic density for nearly all values of the soft SUSY-breaking parameters and tan(beta).
        Speaker: Pearl Sandick (University of Minnesota)
        Paper
        Slides
      • 17:10
        The Lightest Higgs Boson and Relic Neutralino in the MSSM with CP Violation 20m
        We discuss the lower bound to the lightest Higgs boson H_1 in the minimal supersymmetric extension of the standard model with explicit CP violation, and the phenomenology of the lightest relic neutralino in the same scenario. We find that the combination of present experimental constraints favours a region of the parameter space where the mass of H_1 is in the range 7 GeV < M_{H_1} < 10 GeV, while 3 < tan(beta) < 5. Assuming a departure from the usual GUT relation among gaugino masses (|M_1| << |M_2|), we find that through resonant annihilation to H_1 a neutralino as light as 2.9 GeV can be a viable dark matter candidate. We call this the CPX light neutralino scenario, and discuss its prospect of detection both from direct and indirect dark matter searches.
        Speaker: Dr Stefano Scopel (Korea Institute of Advanced Study, Seoul)
        Paper
        Slides
      • 17:30
        SUSY-GUTs, SUSY-Seesaw and the Neutralino Dark Matter 20m
        We will consider a SUSY-$SU(5)$ with one right-handed neutrino with a large top like Yukawa coupling. Assuming universal soft masses at high scale we compute the low-energy spectrum and subsequently the neutralino LSP relic density taking also into consideration $SU(5)$ as well as the see-saw running effects above the gauge coupling unification scale. We found that there exists no viable region in parameter space for $\tan\beta~\ler ~35$. The $\tilde{\tau}$ coannihilation process starts becoming efficient for $\tan\beta~\ger~35-40$. However, unlike in mSUGRA, this process is significantly constrained by the limited range in which the stau is lighter than the neutralino. In fact, for a given $\tan\beta$ we find that there exists an upper bound on the lightest neutralino mass ($M_{\chi_1^0}$) in this region. The A-pole funnel region appears at very large $\tan\beta~\sim 45-50$, while the focus-point region does not make an appearance till large ($m_0,M_{1/2})\sim$ a few TeV. Large $A_0$ terms at high scale can lead to extended regions consistent with WMAP constraints and remove the upper bounds in the stau coannihilation regions.
        Speaker: Lorenzo Calibbi (Universitat de Valencia)
        Paper
        Slides
      • 17:50
        Effect of radiative corrections at order alpha_s to neutralino annihilation processes on the cold dark matter relic density 20m
        Supersymmetry (SUSY) is the most economical and best studied possible extension of the Standard Model of particle physics. In particular, the lightest of the four neutralinos is a good candidate for the cold dark matter, which accounts for about 25% of our universe and whose nature remains at present unknown. The possibility to compute the neutralino relic density within a given model and to compare to cosmological data provides an interesting possibility to constrain the SUSY parameter space and to obtain complementary information with respect to collider experiments. As new experiments will deliver more precise cosmological data in a near future, radiative corrections to the neutralino pair annihilation cross section become important within this context. We compute the (SUSY-)QCD corrections contributing to the annihilation cross section and we evaluate their effect on the cross section itself as well as on the neutralino relic density with respect to cosmological constraints. We present an extensive analysis of the (SUSY-)QCD corrections to neutralino pair annihilation processes in different cosmological regions of the mSUGRA parameter space. In a first step, we study the annihilation into a pair b\bar{b} through pseudoscalar Higgs exchange, which dominates in the cosmological "A-funnel" region caracterized by large tan(beta). Our study confirms the importance of radiative corrections, which decrease the annihilation cross section by about 50% for the QCD part, and by up to another 10% for the SUSY-QCD part. In consequence, the neutralino relic density increases, and the "A-funnel" slope agreeing with cosmological data is shifted to smaller SUSY masses. The second step of our project consists of a similar study for neutralino pair annihilation into a quark-antiquark pair through Z-boson or squark exchange, which are the dominant processes in the cosmological "bulk" region. We compute all relevant (SUSY-)QCD corrections and we evaluate their effect on the annihilation cross section and the cosmologically favoured regions of the SUSY parameter space.
        Speaker: Mr Björn Herrmann (LPSC Grenoble)
        Paper
        Slides
      • 18:10
        Constraining the mSUGRA parameter space through entropy and abundance criteria 20m
        We derive an expression for the entropy of a present dark matter halo described by the Navarro-Frenk-White model and a core. The comparison of this entropy with the one of the halo at the freeze-out era allows us to constrain the parameter space in mSUGRA models, when used with the WMAP observations. Moreover, by joning these results with the ones obtained from the usual abundance criteria, we are able to clearly descriminate validity regions among the tan beta values of the mSUGRA model, by demanding both criteria to be consistent with the 2 sigma bounds of the WMAP observations for the relic density: 0.0945
        Speaker: Prof. Myriam Mondragon (Instituto de Fisica, UNAM, Mexico)
        Paper
        Slides
    • 16:30 18:30
      Flavor Physics 2 Eiermann-Auditorium

      Eiermann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Radiative and Electroweak penguin decays at the B-Factories 20m
        We present recent results on radiative B decays using data collected by the BaBar detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. We report several measurements among which the inclusive b -> s gamma rate and CP asymmetry and results on b->d gamma decays.
        Speaker: Karsten Köneke (MIT)
        Paper
        Slides
      • 16:50
        Leptonic decays at BaBar 20m
        We present recent results on leptonic B decays using data collected by the BaBar detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. We report several measurements among which searches for the B -> tau nu and other B-> ll final states.
        Speaker: Guglielmo De Nardo (INFN Sezione di Napoli)
        Paper
        Slides
      • 17:10
        Studies of B decays with missing energy at Belle 20m
        We report the results of studies of $B$ decays with misiing energy due to > two or more neutrinos such as $B\to \tau \nu$, $B\to D^{(*)}\tau\nu$ and > $B \to h^(*) \nu \bar\nu$. The analysis uses a large data sample collected > at the $\Upsilon(4S)$~resonance with the Belle detector at the KEKB > asymmetric energy $e^+e^-$~collider.
        Speaker: Maria Rozanska (Krakow)
        Slides
      • 17:30
        CP violation in b->s penguin decays at BaBar 20m
        We present recent measurements of CP violation in b->s penguin decays using data collected by the BaBar detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. We present several measurements among which sin2beta from B->Kspi0, B->pi0pi0Ks and B->KsKsK0 decays.
        Speaker: NITESH SONI (University of Birmingham (UK))
        Paper
        Slides
      • 17:50
        Studies of penguin dominated B decays at Belle 20m
        We present measurements on penguin dominated $B$ decays which are sensitive to new physics, such as $CP$-violation parameters and branching fractions in $b \to s q\bar{q}$ and $b \to d q\bar{q}$ gluonic and radiative decays using a large sample of $B\bar{B}$ pairs recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider.
        Speaker: Yosuke Yusa (Virginia Polytechnic Inst. and State Univ.)
        Paper
        Slides
      • 18:10
        Branching Fractions and Direct CP Asymmetries of Charmless B Decay Modes at the Tevatron 20m
        We present new CDF results on the branching fractions and time-integrated direct CP asymmetries for B0 and B0(s) decay modes into pairs of charmless charged hadrons (pions or kaons). The data-set for this update amounts to fb-1 of p anti-p collisions at a center of mass energy 1.96 TeV. We report the first observation of the B0(s) --> K- pi++ mode and a measurement of its branching fraction an direct CP asymmetry. We also observe for the first time two charmless decays of the Lambda_b-baryon: Lambda0(b) --> p pi+- and Lambda0(b) --> pK-.
        Speaker: Dr Michal Kreps (Karlsruhe)
        Paper
        Slides
    • 20:00 22:00
      Public Lecture: The Qantum and the Cosmos - Edward KOLB Audimax

      Audimax

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Long before the emergence of planets, stars, or
      galaxies, the universe consisted of an exploding
      quantum soup of "elementary" particles.
      Encoded in this formless, shapeless soup were
      seeds of cosmic structure, which over billions
      of years grew into the beautiful and complex
      universe we observe today.
      The lecture will explore the connection between
      the "inner space" of the quantum and the
      "outer space" of the cosmos. The inner
      space/outer space connection may hold the
      key to the nature of the dark matter holding
      together our galaxy and the mysterious dark
      energy pulling apart our universe

    • 09:00 10:30
      Plenary Session Gerthsen-Auditorium

      Gerthsen-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 09:00
        Direct searches for Higgs and Beyond the SM at the Tevatron 25m
        Speaker: Arnaud Duperrin
        Paper
        Slides
      • 09:30
        Electroweak and top physics at the Tevatron and indirect Higgs limits 25m
        Speaker: Sandra Leone
        Paper
        Slides
      • 10:00
        Search for TeV scale physics in heavy flavour decays 25m
        Speaker: George Hou
        Paper
        Slides
    • 10:30 11:00
      coffee break 30m Gaede-Foyer

      Gaede-Foyer

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
    • 11:00 12:30
      Plenary Session Gerthsen-Auditorium

      Gerthsen-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 11:00
        SUSY beyond minimal flavour violation 25m
        Speaker: Sebastian Jäger
        Paper
        Slides
      • 11:30
        SM predictions for Heavy Flavour Physics 25m
        Speaker: Andrzej Czarnecki
        Slides
      • 12:00
        Large tanbeta Effects in Flavour Physics 25m
        Speaker: Gino Isidori
        Paper
        Slides
    • 14:00 16:00
      Colliders - Higgs Phenomenology 5 (Experiment) Small Auditorium A

      Small Auditorium A

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Search for Charged Higgs bosons at the LHC 20m
        ATLAS and CMS results.
        Speaker: Martin Flechl (IKP, Uppsala Universitet)
        Paper
        Slides
      • 14:20
        Search for Higgs Bosons in Non-Minimal models 20m
        ATLAS and CMS results.
        Speaker: Nancy Marinelli (Univ. of Notre Dame)
      • 14:40
        Determination of the discovery potential for Higgs bosons in the MSSM 20m
        ATLAS and CMS results
        Speaker: Dorian Kcira (Universite Catholique de Louvain)
        Paper
        Slides
      • 15:00
        Determination of Higgs bosons properties at LHC 20m
        ATLAS and CMS results.
        Speaker: Christoph Ruwiedel (Rheinische Friedrich-Wilhelms Universitaet Bonn)
        Paper
        Slides
      • 15:20
        Double Parton Scattering in Associate Higgs Boson Production with Bottom Quarks at Hadron Colliders 20m
        Higgs boson production in association with bottom quarks, is one of the most important channels for Higgs particles in the Standard Model (SM) and its supersymmetric extension at the LHC pp collider . The theoretical prediction of the corresponding cross section has been improved by including the complete next-to-leading order QCD corrections. We review the status results for the leading order to the partonic process and present calculations for the integrated cross-section in both single and double parton scattering collisions. At very high energies both single and the double parton scatterings contribute to the process, the later mechanisms, although power suppressed, giving the sizable contribution to the integrated cross section.
        Speaker: Dr Mohammad Hussein (Dept. of Physics, University of Bahrain)
      • 15:40
        Distributions for Higgs + jet at hadron colliders: MSSM versus SM 20m
        We present pseudorapidity and transverse momentum distributions for the cross section for the production of the lightest neutral Higgs boson in association with a high-p_T hadronic jet, calculated in the framework of the minimal supersymmetric standard model. We discuss the theoretical predictions for the differential cross sections at the Large Hadron Collider and the Tevatron for the most common benchmark scenarios. In particular, we investigate the differences in the distributions
        Speaker: Dr Oliver Brein (IPPP, Durham)
        Paper
        Slides
    • 14:00 16:00
      Colliders - Susy Phenomenology 5 (Theory) Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Chairperson: Dirk ZERWAS

      • 14:00
        NLO Event Generation for Chargino Production at the ILC 20m
        In the Chargino-/ Neutralinosector of the MSSM, the electroweak SUSY parameters can be determined by a small number of measurements of masses and cross sections. NLO corrections to these observables are in the percent regime, thereby matching the size of experimental fitting accuracies for joint LHC/ ILC analyses. We therefore include the NLO result for Chargino at the ILC production in the Monte Carlo Event Generator Whizard. In a fixed NLO approach, the event generation suffers from negatve event weights in certain points of parameter space. Therefore, we in addition present an alternative way to include photonic corrections which avoids negative weights by resumming leading logarithmic contributions from photon emission to all orders and automatically accounts for additional higher order contributions. This method is process-indepenent can be applied to the inclusion of any other 2->2 process at NLO. For Chargino pair-production, we present cross sections as well as differential event distributions for both methods.
        Speaker: Dr Tania Robens (RWTH Aachen, Institut fuer Theoretische Physik E)
        Paper
        Slides
      • 14:20
        Two-photon exclusive production of supersymmetric pairs at the LHC 20m
        At the LHC, the two-photon production of charged supersymmetric pairs has a unique signature and, for masses below 200-250 GeV, significative cross- sections. In comparison to the nominal supersymmetric studies at the LHC it offers an interesting and very complementary potential. Using the adopted CalcHEP program, interfaced to the Pythia generator, first analysis has been performed of the two-photon chargino, slepton and charged higgs boson pairs in MSSM. The signal selection and suppression of the principal backgrounds due to W boson and lepton pair production have been studied at the generator level, resulting in first sensitivity estimates. Finally, the technical issues of the two-photon event selection in the harsh LHC environment are also discussed, and prospects for further developments are given.
        Speaker: Krzysztof Piotrzkowski (Universite Catholique de Louvain)
        Slides
      • 14:40
        Probing the SUSY-QCD coupling identity at LHC 20m
        Due to supersymmetry, the quark-squark-gluino Yukawa coupling is constrained to be equal to the corresponding quark-quark-gluon QCD gauge coupling. Based on earlier investigations of like-sign dilepton final states, it is shown how information about this coupling can be extracted from an analysis of squark and gluino production processes at LHC. The method is refined to be maximally independent of model assumptions and of data ouside of LHC. Using simulations of the relevant processes, estimates for the expected precision are given.
        Speaker: Dr Ayres Freitas (University of Zurich)
        Slides
      • 15:00
        Tau polarization in SUSY cascade decays at LHC 20m
        Tau leptons emitted in cascade decays of supersymmetric particles are polarized. The polarization may be exploited to determine spin and mixing properties of the neutralinos and stau particles involved. Details of the analysis including experimental effects such as transverse momentum cuts are presented for LHC.
        Speaker: Dr Kentarou Mawatari (Korea Institute for Advanced Study)
        Paper
        Slides
      • 15:20
        Reconstructing Sparticle Mass Spectra using Hadronic Decays 20m
        Most sparticle decay cascades envisaged at the Large Hadron Collider (LHC) involve hadronic decays of intermediate particles. We use state-of-the art techniques based on the \kt jet algorithm to reconstruct the resulting hadronic final states for simulated LHC events in a number of benchmark supersymmetric scenarios. In particular, we show that a general method of selecting preferentially boosted massive particles such as W, Z or Higgs bosons decaying to jets, using sub-jets found by the \kt algorithm, suppresses QCD backgrounds and thereby enhances the observability of signals that would otherwise be indistinct. Consequently, measurements of the supersymmetric mass spectrum at the per-cent level can be obtained from cascades including the hadronic decays of such massive intermediate bosons.
        Speaker: Mr Are Raklev (University of Bergen)
        Slides
      • 15:40
        Mass Determination in SUSY-like Events with Missing Energy 20m
        We demonstrate that sparticle masses in a susy decay chain can be determined to within about 1 GeV using full kinematic information about the production events. A typical decay chain that we consider is gluino pair production followed by both gluinos decaying to the 2nd lightest neutralino, each of which decays to a slepton and a lepton, followed by each of the sleptons decaying to a lepton and the lightest neutralino (LSP). In short, we are able to determine the absolute mass scale with accuracy similar to that known to be achievable for mass differences in such a decay chain. A description of the technique will be given and several examples provided. The quoted precision is that obtained after including detector resolution and backgrounds.
        Speaker: John Gunion (University of California at Davis)
        Slides
    • 14:00 16:00
      Cosmology 5 Lehmann-Auditorium

      Lehmann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Connections between colliders and cosmology in the nMSSM 20m
        In a minimal singlet extension of the MSSM, the nMSSM, both the problem of baryogenesis and dark matter can be elegantly solved without large fine-tuning. As a result of these cosmological constraints, the parameter space of the nMSSM is strongly reduced, and the model predicts that a number of new Higgs and supersymmetric particles are within reach of the LHC and ILC. Here the collider phenomenology at the LHC and ILC is analyzed in detail. It is shown that the LHC could make discoveries of sereval new particles, while precision measurements at the ILC would allow to test the role of the nMSSM for the origin of baryonic matter and dark matter. Also prospects for dark matter direct detection and searches for the electron electric dipole moment are presented.
        Speaker: Dr Ayres Freitas (University of Zurich)
        Slides
      • 14:20
        Phenomenology of Models with Mirage Unification 20m
        We examine the phenomenology of recently constructed models where moduli-mediated contributions to soft SUSY breaking (SSB) parameters are comparable to those from the Weyl anomaly. This structure of the soft terms arises in models of string compactification with fluxes, where the addition of an anti-brane leads to an uplifting potential which yields a de Sitter Universe and supersymmetry breaking. The apparent (mirage) unification of SSB parameters at a scale not associated with any physical threshold is the hallmark of this scenario. The phenomenology mainly depends on the relative strengths of moduli- and anomaly-mediated contributions to these soft parameters. We delineate the regions of parameter space consistent with the measured relic density of dark matter and other constraints, and display the reach of the LHC and the proposed linear collider. We discuss prospects for detection of dark matter via direct and indirect searches, and show that most of these models should be accessible at a ton-sized noble gas detector. Time permitting, we will also discuss direct tests for mirage unification and how these may lead to a determination of the so-called modular weights.
        Speaker: Prof. Xerxes Tata (University of Hawaii)
        Slides
      • 14:40
        Non-Universal gaugino masses and implications on the Dark Matter and Higgs searches 20m
        Non-universal boundary conditions in grand unified theories can lead to non-universal gaugino masses at the unification scale. In R-parity preserving theories the lightest supersymmetric particle is a natural candidate for the dark matter. We have studied the composition of the lightest neutralino in non-universal gaugino mass cases from the SU(5), and implications on the dark matter. In the 24 dimensional representation areas of proper thermal relic density are found. The possibility to observe the neutral MSSM Higgs bosons (h/H/A) at the LHC via neutralino cascades when the lightest neutralino is dark matter, is discussed, and the connection to neutralino dark matter is established. The talk is based on: K. Huitu, J. Laamanen, P.N. Pandita, S. Roy, Phys.Rev. D72 (2005) 055013 K. Huitu, R. Kinnunen, J. Laamanen, S. Lehti, S. Roy, T. Salminen, (in preparation)
        Speaker: Dr Jari Laamanen (Helsinki Institute of Physics)
        Paper
        Slides
      • 15:00
        Lightest neutralino in the MNSSM 20m
        In the minimal supersymmetric standard model (MSSM) and Minimal Non--minimal Supersymmetric Standard Model (MNSSM) the lightest neutralino can be absolutely stable providing a good candidate for the cold dark matter component of the Universe. At the same time the \mu problem of the MSSM is solved within MNSSM without accompanying problems related with the appearance of domain walls. In contrast with the MSSM the allowed range of the mass of the lightest neutralino in the MNSSM is limited. We establish the theoretical upper bound on the lightest neutralino mass in the framework of this model. We also obtain an approximate solution for the mass of the corresponding particle. The lightest neutralino is predominantly a singlino so that its couplings to Z boson and other observed particles are suppressed in the considered model.
        Speaker: Dr Roman Nevzorov (University of Glasgow)
        Paper
        Slides
      • 15:20
        Mixed-sneutrino dark matter at the LHC 20m
        In supersymmetric theories with right-handed neutrinos, new possibilities open up for dark matter. I will discuss a scenario in which right-handed sneutrinos with weak-scale masses mix with left-handed sneutrinos through weak-scale A terms. In this case the lightest sneutrino mass eigenstate is a viable dark matter candidate. After discussing the constraints on this model from requiring the correct relic abundance and from direct-detection experiments, I will present an analysis of signatures of this scenario at the LHC. The NLSP typically decays promptly, so the phenomenology is distinct from the recently studied case where the LSP sneutrino is almost entirely right-handed. Possible signatures include dileptons with a rather unusual invariant mass distribution, from cascades involving the decay of the lightest neutralino, and Higgs or Z bosons from the decays of the heavier sneutrinos to the lighter ones, produced in association with leptons.
        Speaker: David Tucker-Smith (Williams College)
        Slides
      • 15:40
        Dark matter in SUGRA models and the LHC 20m
        The minimal supergravity (mSUGRA) model explains the observed dark matter content of the universe and requires the stau-neutralino co-annihilation mechanism in the early universe for a region of supersymmetry parameter space. This co-annihilation region is characterized by a small mass difference (~5-15 GeV) between the lightest stau and the lightest neutralino. An accurate measurement of the small mass difference at a collider is crutial to confirm the co-annihilation mechanism. In this talk, I will discuss the possible signals in the co-annihilation region and the accuracy of measuring this small mass difference at the LHC. I will use these accurately measured parameters to calculate the relic density and show that the accuracy of measuring the dark matter content can be comparable to those obtained from WMAP. I will also show that the gaugino universality condition at the GUT scale can be checked in this coannihilation region at the LHC. This talk is based on the following papers: Phys. Lett. B649 (2007) 73; Phys. Lett. B639 (2006) 46; paper in preparation
        Speaker: Prof. David Toback (Texas A&M University)
    • 14:00 16:00
      Flavor Physics 3 Eiermann-Auditorium

      Eiermann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Leptogenesis and LFV in the left-right symmetric seesaw mechanism 20m
        Studies of leptogenesis and of lepton flavour violation are usually done in the framework of the type I seesaw mechanism, or assume dominance of one of the two (type I or type II) seesaw mechanisms. In this talk, we discuss the generic situation where both contributions to light neutrino masses can be comparable in size and are related by a left-right symmetry. We find qualitatively different results from the type I seesaw mechanism; in particular, we show that the left-right symmetric seesaw mechanism provides new opportunities for successful leptogenesis in SO (10) models.
        Speaker: Dr Stephane Lavignac (SPhT Saclay)
        Paper
        Slides
      • 14:20
        Predictive Model of Inverted Neutrino Mass Hierarchies and Resonant Leptogenesis 20m
        I'll discuss the scenario of inverted neutrino mass hierarchies. Due to symmetry arguments, the model has several predictions. The solar mixing angle is correlated to the third leptonic mixing angle such that we get $\theta_{13}>0.13$ and CP violating phase $\delta <45^o$. Moreover, the atmospheric mixing angle is close to the maximal value $45^o$. The neutrino less double beta decay parameter is predicted in a narrow range $0.01 eV< m_{ee}<0.022 eV$. All this can be tested by future experiments. The construction has all ingredients for realizing the resonant leptogenesis, avoiding supersymmetric gravitino problem.
        Speaker: Dr zurab tavartkiladze (Oklahoma State University)
        Slides
      • 14:40
        Impact of non-standard neutrino interactions on future oscillation experiments 20m
        We discuss impact of non-standard interactions with neutrinos (NSIs) on future oscillation experiments. In order to study the sensitivity to NSIs, we perform the numerical simulations which take into account uncertainties in neutrino oscillation parameters, realistic experimental setups, and their systematic errors. We show that a neutrino factory experiment has excellent prospects of detecting NSIs originating from new physics at the O(1) TeV scale. We also examine the near future experiments, reactor and accelerator experiments, and illustrate the effect of NSIs within the current experimental bounds to the determination of the oscillation parameters such as theta13 and deltaCP.
        Speaker: Dr Toshihiko Ota (Max-Planck-Institut fuer Kernphysik)
        Paper
        Slides
      • 15:00
        MiniBooNE and shortcuts in the extra dimension 20m
        Theories with large extra dimensions have provided new perspectives on a plethora of old problems in particle physics and cosmology. Interesting applications include the amelioration of the large hierarchy between the weak and the Planck scale, the generation of small neutrino masses and the prediction of quatum gravity effects at energy scales around a TeV. Also a non-inflationary solution to the cosmological horizon problem has been advocated, due to graviton shortcuts in the extra-dimensional bulk. The talk introduces a new consequence of extra dimensions, namely neutrino oscillations due to sterile neutrino shortcuts in the extra dimension. This scenario abolishes the contradiction of the LSND neutrino oscillation experiment with other short-baseline experiments and/or solar and atmospheric neutrino oscillation results. It also provides a unique solution to the anomalous events at low energies in the MiniBooNE experiment.
        Speaker: Heinrich Paes (University of Alabama)
        Paper
        Slides
      • 15:20
        Detecting atmospheric neutrino oscillations in ATLAS 20m
        We discuss the possibility to study oscillations of atmospheric neutrinos in the ATLAS experiment at CERN. Due to the large detector mass, a significant number of events is expected, and during the shutdown phases of the LHC, reconstruction of these events will be possible with very good energy and angular resolutions. We argue that 500 live days of neutrino running should be achievable, and that a total of about 160 contained nu_mu events and about 750 upward going muons could be collected during this time. Despite the low statistics, the excellent detector resolution will allow for an unambiguous confirmation of atmospheric neutrino oscillations and for a measurements of the leading oscillation parameters. Though our simulations show that the sensitivity of ATLAS is worse than that of dedicated neutrino experiments, we demonstrate that more sophisticated detectors, e.g. at the ILC, could be highly competitive with upcoming superbeam experiments, and might even give indications for the mass hierarchy and for the value of theta_13.
        Speaker: Mr Joachim Kopp (Max-Planck Institut fuer Kernphysik, Heidelberg)
        Paper
        Slides
      • 15:40
        Search for neutrinoless double beta decay with NEMO-3 and SuperNEMO 20m
        The NEMO-3 experiment located in the Modane Underground Laboratory (LSM) is searching for neutrinoless double beta decay. The experiment has been taking data since 2003 with a range of isotopes. The main isotopes are ~ 7 kg of 100Mo and ~ 1 kg of 82Se. Since no evidence for neutrinoless double beta decay has been found, a 90% Confidence Level lower limit on the half-life of this process is derived. From this we determine an upper limit on the effective Majorana neutrino mass using nuclear matrix elements. The data are also interpreted in terms of alternative models, such as weak right-handed currents or Majoron emission. In addition, NEMO-3 has performed precision measurements of the double beta decay process with two neutrinos emitted in the final state. Measurements of this process are important for reducing the uncertainties on the nuclear matrix elements. The most recent experimental results will be presented.
        Speaker: Vladimir Vasiliev (University College London)
    • 14:00 16:00
      Theoretical Models (String Theory and Formal Aspects of SUSY) 3 Jordan Auditorium

      Jordan Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Flux Stabilization in 6 Dimensions: D-terms and Loop Corrections 20m
        The D-terms induced by gauge theory fluxes in the context of 6-dimensional supergravity models are discussed. On the one hand, this is arguably the simplest concrete setting in which the controversial idea of `D-term uplifts' can be investigated. On the other hand, it is a very plausible intermediate step on the way from a 10d string theory model to 4d phenomenology. Our specific results include the flux-induced one-loop correction to the scalar potential coming from charged hypermultiplets. Furthermore, we comment on the interplay of gauge theory fluxes and gaugino condensation in the present context, demonstrate explicitly how the D-term arises from the gauging of one of the compactification moduli, and briefly discuss further ingredients that may be required for the construction of a phenomenologically viable model. In particular, we show how the 6d dilaton and volume moduli can be simultaneously stabilized, in the spirit of KKLT, by the combination of an R symmetry twist, a gaugino condensate, and a flux-induced D-term. (Based on hep-th/0611102, by A. P. Braun, A. Hebecker, M. Trapletti)
        Speaker: Dr Michele Trapletti (ITP - Heidelberg University)
        Paper
        Slides
      • 14:20
        Smooth heterotic compactifications and anomalous U(1)s 20m
        As recently shown, heterotic string compactifications on Calabi-Yau manifolds admit multiple anomalous U(1)s if the gauge background consists of several unitary bundles. Constructions of this type (including 5-branes also) considerably amplify the (standard) model building options on the one hand, and U(1) bundles reproduce (blow-ups of) heterotic Abelian orbifold models on the other hand.
        Speaker: Dr Gabriele Honecker (CERN)
        Paper
        Slides
      • 14:40
        F-term uplifting via consistent D-terms 20m
        The issue of fine-tuning necessary to achieve satisfactory degree of hierarchy between moduli masses, the gravitino mass and the scale of the cosmological constant has been revisited in the context of supergravities with consistent D-terms. We have studied (extended) racetrack models where supersymmetry breaking and moduli stabilisation cannot be separated from each other. We show that even in such cases the realistic hierarchy can be achieved on the expense of a single fine-tuning. The presence of two condensates changes the role of the constant term in the superpotential, W_0, and solutions with small vacuum energy and large gravitino mass can be found even for very small values of W_0. Models where D-terms are allowed to vanish at finite vevs of moduli fields - denoted `cancellable' D-terms - and the ones where D-terms may vanish only at infinite vevs of some moduli - denoted `non-cancellable' - differ markedly in their properties. It turns out that the tuning with respect to the Planck scale required in the case of cancellable D-terms is much weaker than in the case of non-cancellable ones. We have shown that, against intuition, a vanishing D-term can trigger F-term uplifting of the vacuum energy due to the stringent constraint it imposes on vacuum expectation values of charged fields. Finally we note that our models only rely on two dimensionful parameters: M_P and W_0.
        Speaker: Dr Oliver Eyton-Williams (Institute of Theoretical Physics, University of Warsaw, 00-681 Warsaw, Poland)
        Slides
      • 15:00
        Moduli Stabilization in Heterotic-Inspired Supergravity 20m
        We discuss moduli stabilization and supersymmetry breaking in the context of the 4d supergravity arising from the heterotic orbifold compactifications. We show that non-perturbative effects alone can lead to a racetrack superpotential which stabilizes the moduli in a supersymmetric minimum and generating a mass hierarchy between the dilaton and the Kahler moduli similar to the KKLT proposal in type IIB. We then study the possibility of realizing within the heterotic string constraints an additional sector which realizes the Intriligator-Seiberg-Shih (ISS) model of meta-stable supersymmetry breaking. In combination this gives a scenario for moduli stabilization in a dS vacuum in the heterotic string with the AdS cosmological constant cancelled by meta-stable supersymmetry breaking along the lines of ISS.
        Speaker: Alexander Westphal (SISSA)
        Slides
      • 15:20
        Low energy SUSY from the heterotic string 20m
        I will describe how the MSSM can be constructed from the heterotic string and discuss consequences of this construction, in particular, in relation to the scale of SUSY breaking.
        Speaker: Dr Oleg Lebedev (CERN)
        Slides
      • 15:40
        Measuring Fine tuning in Supersymmetry 20m
        The solution to fine tuning is one of the principal motivations for supersymmetry. However constraints on the parameter space of the Minimal Supersymmetric Standard Model (MSSM) suggest it may also require fine tuning (although to a much lesser extent). To compare this tuning with different extensions of the Standard Model (including other supersymmetric models) it is essential that we have a reliable, quantitative measure of tuning. We review the measures of tuning used in the literature and propose an alternative measure. We apply this measure to several toy models and the MSSM with some intriguing results.
        Speaker: Mr Peter Athron (Glasgow University)
        Paper
        Slides
    • 16:00 16:30
      coffee break 30m Gaede-Foyer

      Gaede-Foyer

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
    • 16:30 18:30
      Colliders - Higgs Phenomenology 6 (Theory) Small Auditorium A

      Small Auditorium A

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Higgs and Sparticle Spectroscopy 20m
        We propose using the lightens CP-even Higgs boson mass bound in the minimal supersymmetric standard model (MSSM) to predict the low mass bound for the stop sector. Considering minimal supergravity (mSUGRA) frame and assuming neutralino is dark matter. We can predict in this frame the low bound for all MSSM sparticle spectrum.
        Speaker: Dr Ilia Gogoladze (University of Delaware)
        Slides
      • 16:50
        Higgs boson production at the LHC: transverse-momentum and rapidity dependence 20m
        We consider Higgs boson production by gluon fusion in hadron collisions. We study the doubly-differential transverse-momentum (qT ) and rapidity (y ) distribution of the Higgs boson in perturbative QCD. In the region of small qT (qT << M_H , M_H being the mass of the Higgs boson), we include the effect of logarithmically-enhanced contributions due to multiparton radiation to all perturbative orders. We use the impact parameter and double Mellin moments to implement and factorize the multiparton kinematics constraint of transverse- and longitudinal-momentum conservation. The logarithmic terms are then systematically resummed in exponential form. At small qT , we perform the all-order resummation of large logarithms up to next-to-next-to-leading logarithmic accuracy, while at large qT (qT ∼ M ), we apply a matching procedure that recovers the fixed-order perturbation theory up to next-to-leading order. We present quantitative results for the differential cross section in qT and y at the LHC, and we comment on the comparison with the qT cross section integrated over y .
        Speaker: Dr Giuseppe Bozzi (ITP Karlsruhe)
        Paper
        Slides
      • 17:10
        Higgs Boson Production via Gluon Fusion: SUSY-QCD Corrections 20m
        The loop-induced processes $gg\to h,H,A$ provide the dominant Higgs boson production mechanisms at the Tevatron and LHC in a large range of the minimal supersymmetric extension of the Standard Model. For squark masses below $\sim 400$ GeV squark loop contributions become important in addition to the top and bottom quark loops. The next-to-leading order QCD corrections to the squark contributions of these processes are determined including the full squark and Higgs mass dependences. They turn out to be large and thus important for the Tevatron and LHC experiments. Squark mass effects of the $K$ factors can be of ${\cal O}(20\%)$. In addition we derive the QCD corrections to the squark contributions of the rare photonic Higgs decays $h,H\to \gamma\gamma$, which play a role for the Higgs searches at the LHC.
        Speaker: Dr Michael Spira (PSI)
      • 17:30
        Susy QCD corrections to Higgs production in gluon fusion 20m
        I will present a calculation of the full SUSY QCD radiative corrections in gluon fusion. The required two-loop amplitudes are computed with a new caclculational method for loop diagrams with both infrared and threshold singularities. This computation is a prototype for many similar computations in other than SUSY BSM scenaria.
        Speaker: Charalampos Anastasiou (CERN)
        Slides
    • 16:30 18:30
      Colliders - Susy Phenomenology 6 (Experiment) Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Chairperson: Darin ACOSTA

      • 16:30
        Searches for Heavy, Long-Lived Particles at CDF 20m
        In this talk we present searches for the long lived massive particles and discuss ideas and plans for the future. Exotic stable massive particles often appear in the models beyond the Standard Model such as supersymmetry or extra- dimensions with WIMP or super-WIMP dark matter candidates. We show two completed analysis: the search for the stable massive charged particles (CHAMPs), and the search for displaced vertices with a photon or an electron as a decay product. We also discuss our future plans to look for previously unexplored signatures.
        Speaker: Vyacheslav Krutelyov
        Slides
      • 16:50
        R-hadron and long lived particle searches at LHC 20m
        We summarise the strategy for searching heavy charged quasi-stable SUSY particles and R-hadrons with the ATLAS detector at the LHC. We review models where R-Hadrons decay in flight within the detector discussing the reconstruction and triggering techniques to be employed to detect such particles.
        Speaker: Shikma Bressler (Technion - Israel Institute of Technology)
        Paper
        Slides
      • 17:10
        Search for Supersymmetry with Gauge-Mediated Breaking with the D0 Detector 20m
        We report the results of a search for supersymmetry (SUSY) with gauge- mediated breaking in the missing transverse energy distribution of inclusive diphoton events using approximately 1.2 fb-1 of data colleced by the D0 experiment at the Fermilab Tevatron Collider in 2002-2006. This analysis is the most sensitive probe for the gauge-mediated SUSY models up to date with a short-lived neutralino as the next-lightest SUSY particle.
        Speaker: Yuri Gershtein (Florida State University)
        Slides
      • 17:30
        CDF Searches for New Physics with Photons 20m
        We present searches for new physics in events containing high--$E_{\rm T}$ photons in CDF Run II data collected at the Fermilab Tevatron. Photons are triggered and reconstructed efficiently and appear in many models such as SUSY, Technicolor, Large Extra Dimensions and compositness. We present results of a search for Randall--Sundrum Gravitons decaying to two photons. We also present searches in signatures including one or two photons with other objects such as leptons, jets and missing $E_{\rm T}$.
        Speaker: Dr Andrey Loginov (Yale University, Physics Department)
        Paper
        Slides
      • 17:50
        Search for GMSB NLSPs at LHC 20m
        Within Gauge-Mediated Supersymmetry Breaking (GMSB) models gravitino is the Lightest Supersymmetry Partner (LSP) whereas neutralino or slepton plays the role of the Next to Lightest Supersymmetry Partner (NLSP). NLSP decays to its Standard Model partner and gravitino with a lifetime depending on the scale of the SUSY breaking. Detection of the NLSP and determination of its properties, in particular lifetime can be of crucial importance for the physics program at LHC. We concentrate on two scenarios specific from the detection point of view. In the first, neutralino decaying in flight is the NLSP. We use not-pointing to the interaction point photons identified by the CMS electromagnetic calorimeter as the signature of decaying in flight neutralinos. We show that it is possible to estimate the ctau of neutralinos for a range from centimeters to meters with a precision of the order of 20%, if the number of produced signal events is not less than about 5000. In the second case a long-lived stau is the NLSP. We show that CMS muon system is able to detect it as a particle traveling with velocity lower than the speed of light, and determine its mass.
        Speaker: Piotr Zalewski (Division of High Energy Physics)
        Paper
        Slides
      • 18:10
        SUSY parameters determination with ATLAS 20m
        We present how parameters such as mass and spin of SUSY particles can be measured at the LHC. The measurements of kinematical distributions, such as edges in the invariant mass of leptons and jets, are used to constrain the model of supersymmetry that we may discover at the LHC. We provide examples from a few points in the mSUGRA scenario and give emphasis to measurements that can be conducted within the first few years of data taking.
        Speaker: Nurcan Ozturk (Unknown)
        Paper
        Slides
    • 16:30 18:30
      Cosmology 6 Lehmann-Auditorium

      Lehmann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        RH Sneutrino Condensate CDM and the Baryon-to-Dark Matter Ratio 20m
        The similarity of the observed densities of baryons and CDM suggest that they have a common or related origin. This can be understood in the context of the MSSM with RH sneutrinos if CDM is due to a d=4 flat direction condensate of very weakly coupled RH sneutrino LSPs and the baryon asymmetry is generated by d = 4 (H_{u}L)^2 Affleck-Dine leptogenesis. An observable CDM isocurvature perturbation is possible in the case of inflation driven by a D-term or by an F-term with suppressed H-corrections to A-terms. Combined with distinctive NLSP collider phenomenology, this would provide a clear signature for RH sneutrino condensate CDM.
        Speaker: Dr John McDonald (Lancaster University)
        Paper
        Slides
      • 16:50
        Unification and Dark Matter in a Minimal Scalar Extension of the Standard Model 20m
        The six Higgs doublet model is a minimal extension of the Standard Model (SM) that addresses dark matter and gauge coupling unification. Another Higgs doublet in the 5 representation of a discrete symmetry group, such as S_6, is added to the SM. The lightest components of the 5-Higgs are neutral, stable and serve as dark matter so long as the discrete symmetry is not broken. Direct and indirect detection signals, as well as collider signatures are discussed. The five-fold multiplicity of the dark matter decreases its mass and typically helps make the dark matter more visible in upcoming experiments.
        Speaker: Ms Mariangela Lisanti (SLAC, Stanford University)
        Slides
      • 17:10
        Stability and Leptogenesis in the left-right symmetric SeeSaw mechanism 20m
        It has previously been shown that in left-right symmetric type I+II seesaw mechanism, an eight-fold degeneracy among the mass matrices of the heavy right handedneutrinos M_R exist. We discriminate among the degenerate solutions, using stability properties of the solutions and their ability to lead to successful baryogenesis via leptogenesis as criteria. Thus, we can partially lift the eight-fold degeracy. We find in particular that viable leptogenesis is generically possible for four out of the eight solutions.
        Speaker: Mr Tomas Hällgren (Royal Institute of Technology (KTH), Department of theoretical physics)
        Paper
        Slides
      • 17:30
        Dark matter from brane oscillations 20m
        If the Standard Model is confined to a brane that spontaneously breaks some of the space-time symmetries of the embedding space, then additional massive vector fields must be included. According to the low energy, four dimensional effective theory describing this scenario, these vector fields couple to the energy momentum tensor of the Standard Model. As the additional vector fields can be stable, they are potential dark matter candidates. The parameter space of the model is constrained by collider llimits from LEPII and the Tevatron, and the results of current direct and indirect dark matter detection experiments. The reach of the LHC and ILC and next generation of dark matter detection experiments to further probe the parameter space is considered.
        Speaker: Prof. Tonnis ter Veldhuis (Macalester College)
        Slides
    • 16:30 18:30
      Flavor Physics 4 Eiermann-Auditorium

      Eiermann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Renormalization Group Evolution of Neutrino Masses in Type I and Type II Seesaw Scenarios 20m
        Analytical formulae of the renormalization group equations are presented in terms of mixing parameters for type I and type II seesaw models. The evolution of neutrino mass parameters are discussed in the SM extended by right-handed neutrinos and a Higgs triplet as well as the extended MSSM. Implications for testing predictions of mass models with future precision experiments are analyzed.
        Speaker: Mr Michael Schmidt (Max-Planck Institut für Kernphysik)
        Slides
      • 16:50
        Constructing Seesaw Textures in Quark-Lepton Complementarity 20m
        We systematically construct the seesaw textures compatible with current data from generic assumptions. We use the context of extended quark-lepton complementarity, i.e., we assume that all contributing mixing angles and mass hierarchies can be described by a small quantity of the order the Cabibbo angle as a single remnant of a Grand Unified Theory. We do not impose special assumptions, such as M_R diagonal, U_l diagonal (no mixings from the lepton sector), or M_D symmetric, but discuss the most general (real) case within the type-I framework. We demonstrate that these special cases only contribute a very small fraction of all constructed seesaw realizations. In addition, we show that often used assumptions for the hierarchies in M_D and M_R are not necessarily our most typical results. In particular, a charged lepton or quark hierarchy in M_D does not appear at all, and both strongly hierarchical or degenerate M_R's, as often used in leptogenesis models, are untypical for the normal neutrino mass hierarchy. Since the allowed set of textures is very large, we show a subjective selection of textures only which could resists increased experimental pressure in the coming ten years. In addition, we mainly focus on the normal neutrino mass hierarchy, since renormalization group effects are small in this case, and hardly affect our procedure.
        Speaker: Mr Florian Plentinger (Universität Würzburg)
      • 17:10
        Can LHC Test the See-Saw Mechanism? 20m
        We consider the prospects for detecting right-handed (Standard Model singlet) neutrinos introduced in the see-saw mechanism at future accelerators. This requires sufficiently large mixing of these neutrinos with the left-handed neutrinos, which is only possible if contributions from different right-handed neutrinos to the light neutrino mass matrix cancel at a level of $10^{-8}$. We search for possible symmetries behind this cancellation. Light neutrino masses can be generated as a result of small perturbations related to violation of these symmetries. The impact of these perturbations on LHC physics is however negligible so that the mechanism of neutrino mass generation and LHC physics are essentially decoupled in general. Under additional assumptions about symmetry breaking some correlation can appear between the collider observables and features of the neutrino mass matrix.
        Speaker: Dr Joern Kersten (Abdus Salam ICTP)
        Paper
        Slides
      • 17:30
        Neutrino Masses and Mixings from Quark Mass Hierarchies 20m
        Motivated by SO(10) models with a vectorial fourth generation of down quarks and leptons, we consider the scenario where the neutrino Majorana and Dirac mass matrices conincide with those of up- and down-quarks, respectively. Then the small neutrino mass hierarchy follows from the mismatch of the quark mass hierarchies. Together with the observed leptonic mixing angles, we arrive at a tightly constrained scenario and we investigate the consequences for CP- and lepton-number violating processes.
        Speaker: Dr Sören Wiesenfeldt (UIUC)
        Paper
        Slides
      • 17:50
        SO(10) SUSY GUTs with family symmetries: the test of FCNCs 20m
        Flavor changing neutral current (FCNC) processes, being forbidden in the Standard Model at the tree level, play an important role in the test of extensions of this model. One popular class of new physics models are Grand Unified Theories (GUTs). Such models, when supplemented by flavor symmetries allow for concrete predictions for various observables - including FCNC processes - in terms of a relatively small number of parameters. We report on a detailed analysis of a supersymmetric SO(10) GUT, recently studied in the literature. We focus on its predictions for FCNCs in the quark sector and confront them with the existing experimental data.
        Speaker: Mr Wolfgang Altmannshofer (Technische Universität München)
        Paper
        Slides
      • 18:10
        Flavor violation in a SUSY GUT 20m
        Leptonic and hadronic flavor violations are studied in a general SU(5)-type supersymmetric grand unification model. Due to a GUT symmetry relating quarks and leptons, flavor violating processes in both sectors can be used to constrain a given single source of flavor non-universality at the GUT scale. Without assuming a very specific boundary condition on the soft supersymmetry breaking terms at the scale where they are given, sfermion mass matrices of 10 and 5 bar representations are examined, using recent B physics data and present and future lepton flavor violation bounds.
        Speaker: Dr Jae-hyeon Park (Tohoku University)
        Paper
        Slides
    • 16:30 18:30
      Theoretical Models (String Theory and Formal Aspects of SUSY) 4 Jordan Auditorium

      Jordan Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Confronting Finite Unified Theories with low-energy phenomenology 20m
        Finite Unified Theories (FUTs) are N=1 supersymmetric Grand Unified Theories that can be made all-loop finite. The requirement of all-loop finiteness leads to a severe reduction of the free parameters of the theory and, in turn, to a vast number of predictions. Here SU(5) FUTs are investigated in the context of low-energy phenomenology observables. We present a detailed scanning of these FUTs, including theoretical uncertainties at the unification scale and applying all phenomenological constraints. Taking into account all low-energy restrictions, such as the anomalous magnetic moment of the muon, b physics observables, bound on the lightest Higgs boson mass and the constraints from cold dark matter density, we can discriminate between different interesting models. We present the predictions of the allowed parameter space for the Higgs boson sector and the supersymmetric particle spectrum of the model that survives the imposed constraints.
        Speaker: Prof. Myriam Mondragon (Instituto de Fisica, UNAM)
        Paper
        Slides
      • 16:50
        Bulk-brane supergravity 20m
        Randall-Sundrum and Horava-Witten scenarios require understanding of bulk-brane interactions in supergravity. Whereas globally supersymmetric models with branes can be easily and consistently constructed, there are still unresolved problems for the locally supersymmetric cases. I will attempt to clarify the problems and report on the progress in their resolution.
        Speaker: Dr Dmitry Belyaev (DESY)
        Paper
        Slides
      • 17:10
        Energy Transfer and Kaluza-Klein Mode Decay between Throats 20m
        Strongly warped regions, also known as throats, are a common feature of the type IIB string theory landscape. If one of the throats is heated during cosmological evolution, the energy is subsequently transferred to other throats or to massless fields in the unwarped bulk of the Calabi-Yau orientifold. This energy transfer proceeds either by Hawking radiation from the black hole horizon in the heated throat or, at later times, by the decay of throat-localized Kaluza-Klein states. In both cases, we calculate in a 10d setup the energy transfer rate (respectively decay rate) as a function of the AdS scales of the throats and of their relative distance . Compared to existing results based on 5d models, we find a significant suppression of the energy transfer rates if the size of the embedding Calabi-Yau orientifold is larger than the AdS radii of the throats. In particular, this is relevant for the analysis of reheating after brane-antibrane inflation. Our calculation employs the dual gauge theory picture in which each throat is described by a strongly coupled 4d gauge theory, the degrees of freedom of which are localized at a certain position in the compact space.
        Speaker: Mr Benedict Harling (Institute for Theoretical Physics, Heidelberg)
        Slides
      • 17:30
        Radius stabilization in 5D SUGRA models on orbifold 20m
        We discuss the stabilization of the size of the extra dimension in the 5 dimensional supergravity models compactified on an S^1/Z_2 orbifold. We consider models with boundary superpotentials and analyze the potential for the radion field from the viewpoint of the 4D effective theory.
        Speaker: Dr Yutaka Sakamura (Osaka University)
        Paper
        Slides
    • 21:00 22:00
      Organ Concert Ev. Stadtkirche, Marktplatz (Ev. Stadtkirche, Marktplatz)

      Ev. Stadtkirche, Marktplatz

      Ev. Stadtkirche, Marktplatz

      Marktplatz Karlsruhe (next to the pyramid)

      Organ Concert with Christian-Markus Raiser.

      Place: Ev. Stadtkirche at Marktplatz Karlsruhe (next to the pyramid).

      Click here for further information.

    • 09:00 18:00
      Excursions Meeting point: the old stadion

      Meeting point: the old stadion

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 09:00
        Baden-Baden and Black Forrest 9h
        Please click here for further information (link will open an new window).
      • 09:00
        Heidelberg and Speyer 9h
        Please click here for further information (link will open an new window).
      • 09:00
        Rhineland-Palatinate and Suedliche Weinstrasse 9h
        Please click here for further information (link will open an new window).
      • 09:00
        Strasbourg and Northern Alsace 9h
        Please click here for further information (link will open an new window).
    • 09:00 10:30
      Plenary Session Gerthsen-Auditorium

      Gerthsen-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 09:00
        Little Higgs, non-standard Higgs, no Higgs and all that 25m
        Speaker: Hsin-Chia Cheng
        Paper
        Slides
      • 09:30
        Complementarity of LHC and ILC 25m
        Speaker: Seong Youl Choi
        Paper
        Slides
      • 10:00
        SUSY predictions and SUSY Tools at the LHC 25m
        Speaker: Ben Allanach
        Slides
    • 10:30 11:00
      coffee break 30m Gaede-Foyer

      Gaede-Foyer

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
    • 11:00 12:30
      Plenary Session Gerthsen-Auditorium

      Gerthsen-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 11:00
        CP violation in SUSY 25m
        Speaker: Sabine Kraml
        Paper
        Slides
      • 11:30
        SUSY Model Building 25m
        Speaker: Stuart Raby
        Paper
        Slides
      • 12:00
        Theoretical Developments in SUSY 25m
        Speaker: Mikhail Shifman
        Paper
        Slides
    • 14:00 16:00
      Alternatives 5 Small Auditorium B

      Small Auditorium B

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Hidden Valley Phenomenology 20m
        We describe a class of models called ``hidden valleys'', which consist of low mass hidden sector quarks charged under a new confining gauge group. Such sectors arise often in string theories and elsewhere. The phenomenology of these sectors is often qualitatively different from other beyond the standard model physics, giving rise to long lived hidden sector hadrons, high invariant mass jets, and multiple isolated leptons in the final state. We discuss search methods for hidden valleys at hadron colliders.
        Speaker: Kathryn Zurek (University of Wisconsin, Madison)
        Slides
      • 14:20
        Search new physics in top quark events with the D0 Detector 20m
        The large mass of the top quark, close to the electroweak symmetry-breaking scale, makes it a good candidate for probing physics beyond the Standard Model. Single top quarks may be produced in the decay of a new heavy gauge boson W' and we present limits on the production cross section and the mass of such a W' assuming standard model like couplings. We also search for single top productions through flavor changing neutral currents involving gluon, Z boson, or photon exchange. We also search for non standard model signatures in top pair events. Models for new physics beyond the standard model are probed by looking at possible different event kinematics or deviations in the measured total or differential cross section.
        Speaker: Isabelle Ripp (Institut Pluridisciplinaire Hubert Curien (IPHC) - Inst. Nat. Ph)
        Paper
        Slides
      • 14:40
        Searches for Leptoquark production in $p\bar{p}$ collisions at the D0 experiment 20m
        We report on searches for the production of scalar and vector leptoquarks in $p\bar{p}$ collisions at the Tevatron collider, which are based on integrated luminosities of up to 1\,fb$^{-1}$ collected with the D\O{} detector. Leptoquarks, which are predicted by several extensions of the Standard Model, are hypothetical particles carrying both lepton and quark flavors. At hadron colliders they can either be pair-produced via the strong interaction or a single leptoquark can be produced in association with a lepton via the hypothesized leptoquark-lepton-quark coupling. Searches for the pair-production of leptoquarks of all three generations have been performed using the $LQ\overline{LQ}\rightarrow l^+l^-q\bar{q}$, $\rightarrow l^\pm \nu q\bar{q}$, and $\rightarrow \nu\bar{\nu}q\bar{q}$ final states. A search for the single production of leptoquarks coupling to muons is based on the decay channel $LQ\mu\rightarrow\mu q \mu$. Upper limits on the production cross sections are given and are used to derive lower limits on the leptoquark masses.
        Speaker: Thomas Nunnemann (Munich)
        Paper
        Slides
      • 15:00
        (Non) SUSY Adjoint SU(5) 20m
        We propose a renormalizable (susy) grand unified theory where the neutrino masses are generated through type III and type I seesaw mechanisms. Several phenomenological and cosmological aspects of this proposal are discussed.
        Speaker: Dr Pavel Fileviez Perez (CFTP, Departamento de Fisica. Instituto Superior Tecnico. Lisbon.)
        Paper
        Slides
      • 15:20
        Vista@CDF: Results of a Model-Independent Search for New Physics in 1fb-1 at CDF 20m
        We present the results of a model-independent search for new physics, conducted on 1fb-1 of data collected by the CDF experiment at the Fermilab Tevatron. A novel technique (Vista) is used to analyse the bulk features of the high-pT data. Event populations and approximately 17,000 kinematic distributions from 340 distinct final states are searched for signs of physics beyond the Standard Model.
        Speaker: Mr Georgios Choudalakis (MIT)
        Paper
        Slides
      • 15:40
        Sleuth@CDF: A quasi-model-independent search for new electroweak scale physics 20m
        Lacking precise theoretical direction for where to look for the first sign of physics beyond the Standard Model, it seems prudent to look in as many places as possible. Sleuth is a quasi-model-independent search strategy for new electroweak scale physics, appropriate for frontier energy hadron colliders. Assuming the new physics appears in the form of structure with characteristic energy scale at or above the masses of the electroweak gauge bosons, and assuming these new produced resonances decay back to Standard Model objects, it holds generically that the signal will appear as an excess of data in a particular exclusive final state at large summed scalar transverse momentum relative to Standard Model and instrumental backgrounds. Using a background estimate obtained from Vista@CDF, the first global quasi-model-independent search at a frontier energy hadron-hadron collider has been obtained on 1 fb^-1 of Tevatron Run II data with Sleuth@CDF. This quasi-model-independent search represents one of the most encompassing tests of the Standard Model at the energy frontier to date.
        Speaker: Mr Georgios Choudalakis (MIT)
        Paper
        Slides
    • 14:00 16:00
      Colliders - Susy Phenomenology 7 (Theory) Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Chairperson: Werner POROD

      • 14:00
        Sneutrino-antisneutrino mixing at future colliders 20m
        Sneutrino-antisneutrino mixing occurs in a supersymmetric model where neutrinos have nonzero Majorana masses. This can lead to the sneutrino decaying into a final state with a ``wrong-sign charged lepton''. In an $e^- \gamma$ collider, the signal of the associated production of an electron-sneutrino and the lighter chargino and the subsequent decays can be $e^- \gamma \rightarrow e^+{\tilde \tau}_1^-{\tilde\tau}_1^- + {p_T \hspace{-.9em}/\;\:}$ where the ${\tilde \tau}_1$s are long-lived and can produce heavily ionizing charged tracks. This signal is free of any Standard Model background and the supersymmetric backgrounds are small. Such a signal can be experimentally observable under certain conditions which are possible to obtain in an anomaly-mediated supersymmetry breaking (AMSB) scenario [1]. At the LHC, sneutrino-antisneutrino mixing can result in a like-sign dilepton signal either through direct sneutrino production or through squark and gluino production. The mixing can also be probed through sneutrino-slepton production. However, in an AMSB scenario, the number of like-sign dilepton signals through sneutrino oscillation is quite small, and backgrounds present a problem for the detectability [2]. [1] T. Honkavaara, K. Huitu, S. Roy, Phys. Rev. D73, 055011 (2006). [2] D.K. Ghosh, T. Honkavaara, K. Huitu, S. Roy, in preparation.
        Speaker: Mr Tuomas Honkavaara (Helsinki Institute of Physics)
        Paper
        Slides
      • 14:20
        Effects of Lepton Flavour Violation on Chargino Production at the Linear Collider 20m
        We study the effects of lepton flavour violation (LFV) on the production processes $e^+e^-\to\tilde\chi^+_i\tilde\chi^-_j$ at a linear collider with longitudinal $e^+$ and $e^-$ beam polarizations. In the case of LFV the sneutrino mass eigenstates have no definite flavour, therefore, in the $t-$channel more than one sneutrino mass eigenstate can contribute to the chargino production cross sections. Our framework is the Minimal Supersymmetric Standard Model (MSSM) including LFV terms. We show that in spite of the restrictions on the LFV parameters due to the current limits on rare lepton decays, the cross section $\sigma(e^+e^-\to\tilde\chi^+_1\tilde\chi^-_1)$ can change up to one order of magnitude by the influence of LFV. We point out that this can be the case even if the present bound on BR($\tau^-\to e^-\gamma$) improves by a factor of thousand. Our results could have an important impact on the strategies for determining the underlying model parameters at the linear collider.
        Speaker: Dr Thomas Kernreiter (University of Vienna)
        Paper
        Slides
      • 14:40
        Impact of slepton generation mixing on the search for sneutrinos 20m
        We perform systematic study of decays of sneutrinos including bosonic decays such as decays into slepton + (W^+ or H^+) as well as fermionic ones in the Minimal Supersymmetric Standard Model (MSSM) with slepton generation mixings and real parameters. We show that the effect of the slepton generation mixings on the branching ratios of the sneutrino decays (both fermionic and bosonic ones) can be quite strong in a significant part of the MSSM parameter space despite the recent very strong experimental limits on lepton flavour violating processes. This could have an important impact on the search for sneutrinos and the determination of the MSSM parameters at future colliders, such as LHC, ILC, CLIC and muon collider.
        Speaker: Prof. Keisho Hidaka (Tokyo Gakugei University)
        Paper
        Slides
      • 15:00
        R-Parity violating minimal supergravity at the LHC 20m
        We consider the case where supersymmetry with broken R-parity is embedded in the minimal supergravity model (mSUGRA). This alters the standard mSUGRA spectrum and opens a wide range in parameter space, where the scalar tau is the lightest supersymmetric particle, instead of the lightest neutralino. We study the resulting LHC phenomenology. Promising signatures would be detached vertices from long-lived staus, multilepton final states and multi-tau final states. We investigate the corresponding cross sections and decay rates in detail.
        Speaker: Mr Sebastian Grab (Physikalisches Institut Bonn)
        Paper
        Slides
      • 15:20
        Long-lived superpartners in the MSSM 20m
        Specific regions in the MSSM parameter space are analysed. It is shown that in the narrow band near the co-annihilation region charged sleptons (staus) may be long-lived particles. This region is consistent with the WMAP restrictions on the Dark matter and depends on the value of \tan\beta. Due to a relatively small mass stau production cross-section at LHC may reach a few % pb. In the other region top squarks become light and even may be the LSP. This happens when the triple scalar coupling A becomes very big compared to m0 and negative. We show that in this case the requirement that the LSP is neutral imposes noticeable constraint on the parameter space similar to constraint from the Higgs mass limit. In some cases these constraints overlap. This picture takes place in a wide region of \tan\beta. In a narrow band close to the border line stops are long-lived particles and decay into quarks and neutralino (chargino). The cross-section of their production at LHC via gluon fusion mechanism in this region may reach a few pb.
        Speaker: Dr Alexey Gladyshev (Joint Institute for Nuclear Research)
        Paper
        Slides
      • 15:40
        Sweet Spot Supersymmetry 20m
        We explain that there is a sweet spot in between the gauge and gravity mediated supersymmetry breaking scenario where the theory is perfectly consistent with various requirements. At the sweet spot, all the classic problems, such as the supersymmetric flavor/CP problem and the mu-problem are solved. The observed dark matter can be explained by the gravitino (with mass O(1) GeV) produced by the decay of the singlet field which is inevitable for supersymmetry breaking. We also explain that this "sweet spot" predicts a characteristic spectrum of supersymmetric particles, that is light scalar tau lepton and light higgs fermion. We also discuss in characteristic signatures and a strategy for confirmation of this class of theories at the LHC experiments.
        Speaker: Dr Masahiro Ibe (Stanford Linear Accelerator center)
        Slides
    • 14:00 16:00
      Cosmology 7 Lehmann-Auditorium

      Lehmann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Gravitino Dark Matter with Stop as the NLSP 20m
        Gravitino has been shown as another viable candidate for dark matter from supergravity models. Gravitino interacting very weakly with other particles, being suppressed by the Planck mass, and as a consequence the Next Lightest Supersymmetric Particle (NLSP) could have a very long lifetime, i.e. becomes a metastable particle. Also because of this very weak interaction , gravitino would be very difficult to detect. The phenomenology of this scenario would depend on the signatures from the NLSP. In this talk I would like to discuss about the feasibility and phenomenology of the stop as the NLSP in a scenario with gravitino LSP as the dark matter.
        Speaker: Dr Yudi Santoso (University of Victoria)
        Paper
        Slides
      • 14:20
        Gravitino dark matter with broken R-parity 20m
        We show that in the case of small R-parity and lepton number breaking couplings, primordial nucleosynthesis, thermal leptogenesis and gravitino dark matter are naturally consistent for gravitino masses m_{3/2} \gsim 5 GeV. The metastable next-to-lightest superparticle has a decay length that is typically larger than a few centimeters, with characteristic signatures at the LHC. The photon flux produced by relic gravitino decays may be part of the apparent excess in the extragalactic diffuse gamma-ray flux obtained from the EGRET data for a gravitino mass m_{3/2} \sim 10 GeV. In this case, a clear signal can be expected from GLAST in the near future.
        Speaker: Dr Alejandro Ibarra (DESY)
        Paper
        Slides
      • 14:40
        Gravitino Dark Matter and Constraints on the Reheating Temperature 20m
        Considering gravitino dark matter scenarios, we study constraints on the reheating temperature of inflation. Within the framework of the constrained minimal supersymmetric Standard Model (CMSSM), we find a maximum reheating temperature of about 10^7 GeV taking into account bound-state effects on the primordial 6Li abundance. We show that late-time entropy production can relax this constraint significantly. With a substantial entropy release after the decoupling of the lightest Standard Model superpartner, thermal leptogenesis remains a viable explanation of the cosmic baryon asymmetry within the CMSSM.
        Speaker: Mr Josef Pradler (Max-Planck-Institut für Physik)
        Paper
        Slides
      • 15:00
        The dark matter as a light gravitino 20m
        In gauge mediated supersymmetry breaking models the relatively light messenger and/or secluded sectors can be partly present in the early universe, depending on the value of the reheat temperature. In particular, a relic stable lightest messenger scalar field with a mass greater than a few tens of TeV would typically lead to an overcloser problem. Relying on a recently studied scenario in the context of a (supergravity coupled) unifying $SO(10)$ gauge group, where a solution to this problem can yield cold dark matter light gravitinos even for a very high reheat temperature, we calculate the full one-loop induced lightest messenger annihilation into a pair of gluons, which is the leading process in the determination of the relic abundance of this MSSM singlet messenger. We also analyze, in terms of the messenger and spurion parameters, the ensuing gravitino abundance due to entropy dilution, assuming Planck scale reduced messenger decay into MSSM particles as well as thermal and non-thermal gravitino production. [based on Phys.Lett.B645:222-227,2007, Phys.Rev.D73:043514,2006, JCAP 0607:010,2006]
        Speaker: Dr Gilbert Moultaka (LPTA-Montpellier, UMR5207-UM2/IN2P3/CNRS)
        Paper
        Slides
      • 15:20
        Cosmology of Gravitino LSP Scenario with Right-Handed Sneutrino NLSP 20m
        We consider supersymmetric model with right-handed (s)neutrinos where the neutrino masses are purely Dirac type. We discuss cosmology based on such a scenario, paying particular attention to the case that the gravitino is the LSP while the right-handed sneutrino is the next-LSP. It will be shown that the cosmological constraints on the gravitino-LSP scenario (in particular, those from the big-bang nucleosynthesis) are drastically relaxed in such a case. We will also consider the implication of such scenario to the structure formation.
        Speaker: Mr Koji Ishiwata (Department of Physics,Tohoku University)
      • 15:40
        Gravitino Dark Matter 20m
        We will be discussing the scenario that the gravitino is the lightest supersymmetric particle and the long-lived next-to-lightest sparticle (NSP) is either the neutralino or the stau. We calculate the dominant two- and three-body decays of both neutralino and stau NSPs, and model the electromagnetic and hadronic decay products using the PYTHIA event generator and a cascade equation. If stau is the NSP, it can form bound states with several nuclei. These bound states may affect the cosmological abundances of Li6 and Li7 by enhancing nuclear rates that would otherwise be strongly suppressed. We consider the effects of these enhanced rates on the final abundances produced in Big-Bang nucleosynthesis (BBN), including injections of both electromagnetic and hadronic energy during and after BBN. Generically, the introduction of these bound states drives light element abundances further from their observed values; however, for small regions of parameter space bound state effects can bring lithium abundances in particular in better accord with observations. We show that in regions where the stau is the NSP with a lifetime longer than 10^3-10^4 sec, the abundances of Li6 and Li7 are far in excess of those allowed by observations. For shorter lifetimes of order 1000 sec, we comment on the possibility in minimal supersymmetric and supergravity models that stau decays could reduce the \li7 abundance from standard BBN values while at the same time enhancing the \li6 abundance.
        Speaker: Dr Vassilis Spanos (University of Patras)
        Paper
        Slides
    • 14:00 16:00
      Flavor Physics 5 Eiermann-Auditorium

      Eiermann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 14:00
        Squark and gaugino hadroproduction and decays in non-minimal flavour violating supersymmetry 20m
        We present an extensive analysis of squark and gaugino hadroproduction and decays in non-minimal flavour violating supersymmetry (SUSY). Within minimal flavour violation, the flavour violating entries in the squark mass matrices are believed to stem from the trilinear Yukawa couplings of the fermion and Higgs supermultiplets, resulting in different renormalizations of the quark and squark mass matrices through renormalization group running, while within non-minimal flavour violating SUSY, additional sources of flavour violation are included and the off-diagonal terms of the mass matrices cannot be simply deduced from the Yukawa couplings alone. We establish the parameter space regions allowed/favoured by low-energy, electroweak precision, and cosmological data, and define several constrained supersymmetry breaking models with non-minimal flavour violation. We present the cross sections for squark-(anti-)squark/gaugino pair and squark-gaugino associated production processes as well as their decay widths and show their dependence on the off-diagonal mass matrix elements in the experimentally allowed/favoured ranges.
        Speaker: Björn Herrmann (LPSC Grenoble)
        Paper
        Slides
      • 14:20
        CKM and Tri-bimaximal MNS Matrices in a SU(5) x (d)T Model 20m
        We propose a model based on $SU(5) \times { }^{(d)}T$ which successfully gives rise to near tri-bimaximal leptonic mixing as well as realistic CKM matrix elements for the quarks. The Georgi-Jarlskog relations for three generations are also obtained. Due to the ${ }^{(d)}T$ transformation property of the matter fields, the $b$- quark mass can be generated only when the ${ }^{(d)}T$ symmetry is broken, giving a dynamical origin for the hierarchy between $m_{b}$ and $m_{t}$. There are only nine operators allowed in the Yukawa sector up to at least mass dimension seven due to an additional $Z_{12} \times Z_{12}^{\prime}$ symmetry, which also forbids, up to some high orders, operators that lead to proton decay. The resulting model has a total of nine parameters in the charged fermion and neutrino sectors, and hence is very predictive. In addition to the prediction for $\theta_{13} \simeq \theta_{c}/2\sqrt{2}$, the model gives rise to a sum rule, $\tan^{2} \theta_{\odot} \simeq \tan^{2} \theta_{\odot, \mathrm{TBM}} - e^{i\beta} \theta_{c}/2$, which is a consequence of the Georgi-Jarlskog relations in the quark sector. This deviation accounts for the difference between the experimental best fit value for the solar mixing angle and the value predicted by the tri-bimaximal mixing matrix.
        Speaker: Prof. Mu-Chun Chen (University of California at Irvine)
        Paper
        Slides
      • 14:40
        A_4 and its double-covering T' as flavor symmetries 20m
        In this talk we present a recently published extension of the MSSM which uses T' as flavor symmetry. The model predicts nearly tri-bi-maximal mixing in the lepton sector as well as relates some elements of the CKM matrix to the quark mass ratios. The key point of the model is the VEV alignment of the flavor symmetry breaking fields, i.e. tri-bi-maximal mixing results from different subgroups of T' which are preserved by different sets of these fields. Other phenomenological aspects of the model such as lepton flavor violating decays will be also discussed.
        Speaker: Ms Claudia Hagedorn (Max-Planck-Institut fuer Kernphysik)
        Slides
      • 15:00
        Supersymmetric mass spectrum of horizontal symmetries 20m
        With the increasing precision on experimental information from flavour violating processes,it is possible to constraint severely theories with horizontal symmetries. These horizontal symmetries, which explain successfully the masses and mixings of fermions, often produce off-diagonal terms in the supersymmetric soft squared mass matrices and in the trilinear terms of the corresponding super-partners, at the scale at which such symmetries are broken. Hence in some cases at electroweak scale these may in fact produce off-diagonal terms that exceed the allowed bounds on flavour changing effects. However in other cases the allowed supersymmetric mass spectrum is enhanced in comparison to that produced assuming the minimal supergravity boundary conditions at high scale. In this talk I will classify those theories which enhance the allowed range of supersymmetric mass spectrum and theories which are likely to be ruled out by upcoming precision on relevant experimental information.
        Speaker: Dr Liliana Velasco-Sevilla (University of Minnesota)
        Slides
      • 15:20
        SUSY CP and Flavour in SUGRA flavour models with tri-bimaximal lepton mixing 20m
        The SUSY CP and flavour puzzle is addressed in a context of recent models of flavour based on SU(3) flavour symmetry. The leptonic tri-bimaximal mixing pattern leads to a simple effective flavour structure giving rise to correlations among the Yukawas and the soft sector that is often enough to ensure compatibility with latest experimental bounds.
        Speaker: Dr Michal Malinsky (University of Southampton)
        Paper
        Slides
      • 15:40
        Proton hexality from an anomalous flavor U(1) 20m
        We devise minimalist U(1)_X Froggatt-Nielsen models which give rise to the recently proposed low-energy discrete gauge symmetry "proton hexality". The proton is thus stable. In addition, having three generations of right-handed neutrinos we can obtain viable neutrino masses. Furthermore one can find scenarios such that no X-charged hidden sector superfields are needed, which, from a bottom-up perspective, allows the calculation of the string coupling constant g_string. The only mass scale apart from M_grav is m_soft.
        Speaker: Dr Christoph Luhn (University of Florida)
        Slides
    • 16:00 16:30
      coffee break 30m Gaede-Foyer

      Gaede-Foyer

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
    • 16:30 18:30
      Colliders - Higgs Phenomenology 7 (Theory) Small Auditorium A

      Small Auditorium A

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Determination of the CP quantum numbers of neutral Higgs bosons in the tau decay channels at the LHC 20m
        At the LHC we consider, within the MSSM, the production of neutral Higgs bosons via gg-fusion and bb-annihilation and the subsequent decay of these bosons into tau+ tau- pairs. We analyze observables which allow to discriminate between scalar and pseudoscalar Higgs bosons and states of undefined CP parity. NLO QCD corrections are taken into account.
        Speaker: Stefan Berge (RWTH Aachen)
        Slides
      • 16:50
        Complementarity of h -> eta eta -> 4b in the search of Higgs boson at the LHC 20m
        The dominance of $h\to \eta \eta$ decay mode for the intermediate mass Higgs boson is highly motivated to solve the little hierarchy problem and to ease the tension with the precision data. However, the discovery modes for $m_h \alt 150$ GeV, $h \to \gamma\gamma$ and $W/Z h \to (\ell\nu/\ell \bar \ell) (b\bar b)$, will be substantially affected. We show that $h \to \eta \eta \to 4b$ is complementary and we can use this decay mode to detect the intermediate Higgs boson at the LHC, via $Wh$ and $Zh$ production. Requiring at least one charged lepton and 4 $B$-tags in the final state, we can identify a clean Higgs boson signal for $m_h \alt 150$ GeV with a high significance and with a full Higgs mass reconstruction. We use the next-to-minimal supersymmetric standard model and the simplest little Higgs model for illustration.
        Speaker: Prof. Kingman Cheung (Natl Tsing Hua Univ)
        Paper
        Slides
      • 17:10
        Hunting a light CP-odd non-standard Higgs boson at a (Super) B factory 20m
        We examine the mixing between a light CP-odd Higgs boson and eta_b states and its implications in the decay rates and masses of both physical (mixed) states in different scenarios beyond the minimal extension of the Standard Model. Special emphasis is put on the phenomenology to be observed at high luminosity B factories.
        Speaker: Dr Miguel Angel Sanchis Lozano (IFIC - University of Valencia)
        Paper
        Slides
      • 17:30
        Light pseudoscalar and Higgs decay in the simplest little Higgs mode 20m
        The SU(3) simplest little Higgs model, with the mu term introduced by hand, accommodates light pseudo-scalar boson, eta. The eta mass can be at 10-100 GeV scale. For lighter eta, the sizable coupling of H-eta-eta leads to dominant decay of the Higgs boson into a pair of eta's especially when mH below the WW threshold. Another new decay channel of H->Z eta can be dominant or compatible with H-> WW for mH above the Z+eta threshold. We show that the LEP bound on the Higgs boson mass is loosened to some extent due to this new H->eta+eta decay channel as well as the reduced coupling of H-Z-Z. The Higgs boson mass bound falls to about 110 GeV for f=3-4 TeV. We also investigate the discovery potential of such scenarios at the LHC, using the production channels Wh and Zh followed by W-> l+nu and Z-> l+l, and h-> eta eta ->4b. We show that a significant Higgs signal can be found at the LHC for mH<160 GeV.
        Speaker: Jeonghyeon Song (Konkuk University)
        Paper
      • 17:50
        Radiative Yukawa Couplings for Supersymmetric Higgs Singlets at Large tan(beta) 20m
        Singlet Higgs bosons present in extensions of the MSSM can have sizable Yukawa couplings to the b quark and the tau lepton for large values of tan (beta) at the 1-loop level. We present an effective Lagrangian which incorporates these tan(beta)-enhanced Yukawa couplings and which enables us to study their effect on singlet Higgs-boson phenomenology within the context of both the mnSSM and the NMSSM. In particular, we find that the loop- induced coupling can be a significant effect for the singlet pseudoscalar, and may dominate its decay modes. Further implications of the tan(beta)-enhanced Yukawa couplings for the phenomenology of the singlet Higgs bosons are briefly discussed.
        Speaker: Mr Robert Hodgkinson (University of Manchester)
        Paper
        Slides
    • 16:30 18:30
      Colliders - Susy Phenomenology 8 (Experiment) Gaede-Auditorium

      Gaede-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

      Chairperson: Dirk ZERWAS

      • 16:30
        Extended LHC reach of the focus point SUSY region 20m
        We have performed detailed analysis of the SUSY focus point (FP) region and work out new set of kinematical variables and cuts which significantly extend LHC reach in FP region compared to previoius results. This opens new perspectives for the SUSY searches at the LHC in FP the related fate of the ILC.
        Speaker: Dr Alexander Belyaev (Southampton University - Rutherford Lab)
        Slides
      • 16:50
        Right-Chiral Sneutrino LSP in mSUGRA: Event characteristics of NLSP at LHC 20m
        We study a supersymmetric scenario where the lighter tau-sneutrino is the lightest supersymmetric particle, while the lighter stau-state is the next lightest. Such a scenario can be motivated within the framework of minimal supergravity, with just the addition of a right-chiral neutrino superfield. Such a spectrum leads to rather unusual signals of supersymmetry, showing stable tracks of the stau in the muon chambers. We study the event characteristics of the long-lived staus and demonstrate that the stau tracks can be distinguished from the muonic ones through proper kinematic cuts which also enable one to remove all standard model backgrounds.
        Speaker: Dr Santosh Kumar Rai (Helsinki Institute of Physics)
        Paper
        Slides
      • 17:10
        Precision Measurement of the Stop Quark Mass at the ILC 20m
        Many supersymmetric models predict many new particles within the reach of the next generation of colliders. For an understanding of the model structure and the mechanism(s) of symmetry breaking, it is important to know the masses of the new particles precisely. The measurement of the mass of the scalar partner of the top quark (stop) at an e+e- collider is studied. A relatively light stop is motivated by attempts to explain electroweak baryogenesis and can play an important role in dark matter annihilation. A method is presented which makes use of cross-section measurements near the pair-production threshold as well as at higher center-of-mass energies. It is shown that this method does not only increase the statistical precision, but also reduces the influence of systematic uncertainties, which can be important. Numerical results are presented, based on a realistic event simulation, for two signal selection strategies: using conventional selection cuts, and using an Iterative Discriminant Analysis (IDA). While the analysis of stops is particularly challenging due to the possibility of stop hadronization, the general procedure could be applied to any mass measurement of particles produced in pairs. Simulation results have been compared with and without the formation of stop hadron states.
        Speaker: Andre Sopczak (Lancaster U)
        Paper
        Slides
      • 17:30
        Detecting metastable staus and gravitinos at the ILC 20m
        A study of various SUSY scenarios is presented in which the lightest supersymmetric particle is the gravitino $\sG$ and the next-to-lightest supersymmetric particle is a scalar tau $\stau$ with lifetimes ranging from seconds to years. Gravitinos are interesting dark matter candidates which can be produced in decays of heavier sparticles at the International Linear Collider (ILC), but remain undetected in direct searches of astrophysical experiments. We investigate the detection and measurement of metastable staus, which may be copiously produced at the ILC either directly or via cascade decays. A proper choice of the experimental conditions will allow one to stop large samples of staus in the calorimeters of the ILC detector and to study the subsequent decays $\stau\to\tau\sG$. Detailed simulations show that the properties of the stau and the gravitino, such as stau mass and lifetime and gravitino mass, can be accurately determined at a future ILC and may provide direct access to the gravitational coupling, respectively Planck scale.
        Speaker: Hans-Ulrich Martyn (RWTH Aachen & DESY)
        Paper
        Slides
      • 17:50
        Spin Analysis of Supersymmetric Particles 20m
        The spin of supersymmetric particles can be determined at e+e- colliders unambiguously without any model assumptions. This will be demonstrated for sleptons and charginos/neutralinos, based on the analysis of excitation curves and angular distributions in production and decay processes. In this way supersymmetry can be discriminated from theories with isomorphic particle spectra like universal extra dimensions.
        Speaker: Peter Matthias Zerwas (DESY Hamburg / RWTH Aachen)
        Paper
        Slides
    • 16:30 18:30
      Cosmology 8 Lehmann-Auditorium

      Lehmann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Gauge Invariant MSSM Inflation 20m
        Minimal Supersymmetric Standard Model has all the ingredients to provide a successful inflation. The inflaton is a gauge invariant flat direction which carries the Standard Model charges. I will discuss how such a model predicts the CMB observations and provides hope for its detectability at LHC. I will also discuss how a thermal production of neutalino in conjunction with MSSM inflation provides interesting bench mark points for the squarks and sleptons which drive inflation.
        Speaker: Dr Anupam Mazumdar (NORDITA)
      • 16:50
        Gravitino Production from Late-Decaying Scalar Field 20m
        We will discuss the gravitino production in early universe from scalar field which reheats the universe. Such production is pointed out to be rather generic and modify usual cosmological scenarios significantly. To be concrete, we will analyze several inflation models.
        Speaker: Dr Motoi Endo (DESY)
        Slides
      • 17:10
        Gravitino Overproduction from Inflaton Decay, and its implication for SUSY breaking 20m
        I will discuss the recently discovered gravitino overproduction from inflaton decay, particualrly focusing on its implication for the SUSY breaking and inflation models. Importantly, since the inflaton generically produces the gravitinos, those constraints will turn out to be quite useful to know which models are realized in nature, especially when the upcoming collider experimental data and/or cosmological observation become available.
        Speaker: Dr Fuminobu Takahashi (DESY)
        Slides
      • 17:30
        Curvature and isocurvature perturbations in two-field inflation 20m
        We study cosmological perturbations in two-field inflation, allowing for non-standard kinetic terms. We calculate analytically the spectra of curvature and isocurvature modes at Hubble crossing, up to first order in the slow-roll parameters. We also compute numerically the evolution of the curvature and isocurvature modes from well within the Hubble radius until the end of inflation. We show explicitly for a few examples, including the recently proposed model of `roulette' inflation, how isocurvature perturbations affect significantly the curvature perturbation between Hubble crossing and the end of inflation.
        Speaker: Dr Krzysztof Turzynski (University of Michigan)
        Paper
        Slides
      • 17:50
        Inhomogeneous preheating in multi-field inflationary models 20m
        We consider an inhomogeneous preheating scenario in multi-field inflationary models. There are at least two fields trapped at the ESP after preheating, one is the inflaton and the other is a ``trapped field'' that plays important role in generating the curvature perturbation. We consider several kinds of the potential for the trapped field, which mimics thermal or quintessential inflation.
        Speaker: Mr Tomohiro Matsuda (Saitama Institute of Technology)
        Paper
        Proceedings
        Slides
      • 18:10
        Chaotic inflation model dominated by the D-term in supergravity 20m
        We present a chaotic inflation model dominated by the D-term in supergravity. Our model opens a new branch of model building for inflation.
        Speaker: Mr Masahide Yamaguchi (Aoyama Gakuin University)
        Slides
    • 16:30 18:30
      Flavor Physics 6 Eiermann-Auditorium

      Eiermann-Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        D0 Mixing at the B-Factories 20m
        We present results for D0-anti-D0 mixing using several different techniques from e+e- colliding-beam data recorded near sqrt(s) 10.6 GeV with the BaBar detector at the PEP-II storage rings at SLAC.
        Speaker: Carlos Chavez (16509268522)
        Slides
      • 16:50
        Search for anomalous direct and indirect CP violation in b to c transitions at Dzero 20m
        We search for anomalous charge asymmetries in the b to c transitions of both neutral and charged B mesons. Indirect CP violation in Bd and Bs mixing is studied using semileptonic decays. Direct CP violation in B+ decay is studied using exclusive decays to J/psi mesons. The results are based on a large data set of proton-antiproton collisions recorded by the Dzero detector operating at the Fermilab Tevatron Collider. Dzero contains independent spectrometers based on an inner solenoid and outer toroids. The magnet polarities are reversed on a regular basis allowing for unprecedented control of the systematic uncertainties associated with charge asymmetry measurements in B meson mixing and decay. The results presented can be used to limit new physics in both Delta Bd and Delta Bs = 2 operators as well as limit recent fourth generation models.
        Speaker: Pieter van den Berg
        Slides
      • 17:10
        The MFV-MSSM as a natural route to near-flavour-conservation in SUSY. Application to meson mixings 20m
        We apply the effective field theory definition of Minimal Flavour Violation (MFV) to the MSSM, requiring the squark soft terms to become functions of the SM Yukawa couplings. For the case of meson oscillations in the DB=2 sector, we show that this approach leads to a striking increase of the predictivity of the model. In particular, we find (i) SUSY corrections to be naturally small and always positive (ii) if mu is not small, an increase in importance (even for low tan beta) of scalar operators due to gluino contributions. The last point signals that (V-A) x (V-A) dominated MFV is in general inconsistent with the MSSM. In this context, we also briefly discuss the MFV-Unitarity Triangle.
        Speaker: Dr Diego Guadagnoli (Technical University Munich)
        Paper
        Slides
      • 17:30
        The Higgs sector of the MSSM and B-Bbar mixing for large tan(beta) 20m
        A systematic analysis of supersymmetric effects in the B_d and B_s mass differences is performed in the large tan(beta) regime. Emphasis is laid on the impact of heavy sparticles on the effective Higgs-mediated FCNC amplitudes.
        Speaker: Dr Stephanie Trine (University of Karlsruhe)
        Paper
        Slides
      • 17:50
        Bs-Bsbar mixing and Bs-->KK decays within supersymmetry 20m
        We consider the constraint of Bs-Bsbar mass difference, Delta m_s, on an MSSM scenario with large flavor mixing. Even with this constraint, we show that a large deviation from the SM in CP asymmetries of Bs-->KK decays is still possible, making this channel promising in search for supersymmetry.
        Speaker: Seungwon Baek (Korea Univ.)
        Paper
        Slides
    • 16:30 18:30
      Theoretical Models (String Theory and Formal Aspects of SUSY) 5 Jordan Auditorium

      Jordan Auditorium

      Karlsruhe University

      Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
      • 16:30
        Intersecting Brane Models and Cosmology 20m
        We introduce a novel mechanism for baryogenesis, in which mixed anomalies between the hidden sector and $U(1)_{baryon}$ drive the baryon asymmetry. We demonstrate that this mechanism occurs quite naturally in intersecting- brane constructions of the Standard Model, and show that it solves some of the theoretical difficulties faced in matching baryogenesis to experimental bounds. We illustrate with a specific example model. We also discuss the possible signals at the LHC. We conclude by discussing some work currently in progress, in which we exhibit a scenario for D-term inflation which naturally fits into the structure of intersecting brane models. In this scenario, tachyonic preheating at the end on inflation can robustly drive hidden sector baryogenesis. We also briefly discuss implementations of this scenario in which Majorana neutrino masses are generated at the end of inflation.
        Speaker: Jason Kumar (Texas A&M University)
        Paper
        Slides
      • 16:50
        Extended Higgs Models and the Transition to Exact Susy 20m
        String landscape ideas and the observation of a positive vacuum energy in the current universe suggest that there could be a future transition to an exactly supersymmetric world. Atomic and molecular binding in this susy background probably require that electroweak symmetry breaking survives the transition. Among several susy higgs models that have been discussed, one stands out in this regard. Thus, the higgs structure that is revealed at the LHC could have strong consequences for the type of bulk susy matter that may arise in a future susy universe.
        Speaker: Louis Clavelli (University of Alabama)
        Paper
        Slides
      • 17:10
        Cycling in the Throat 20m
        I will discuss the dynamics of a probe D3-brane propagating in a warped string compactification. I will focus in the exploration of the trajectories obtained from giving the brane angular momentum in the extra dimensions. I will show that, in general, angular momentum creates a centrifugal barrier, causing bouncing as well as cyclic cosmologies from a "mirage" point of view. I will also comment on how these results get modified once the effects of coupling the brane action to gravity, are taken into account.
        Speaker: Dr Ivonne Zavala (Durham University)
        Slides
      • 17:30
        Very Light Cosmological Scalar Fields from a Tiny Cosmological Constant 20m
        We propose a new mechanism to generate the mass of a scalar field in an expanding universe. The mass of this field turns out to be generated by the cosmological constant and can be naturally small if protected by a conformal symmetry which is however broken in the gravitational sector. The mass is comparable today to the Hubble time. This scalar field could thus impact our universe today and for example be at the origin of a time variation of the couplings and masses of the parameters of the standard model. A time variation of the parameters of the standard model would allow to test grand unified theories.
        Speaker: Dr Xavier Calmet (Université Libre de Bruxelles)
        Slides