Tobias Golling
(Universite de Geneve (CH))
07/04/2015, 09:00
Planary Talk
An overview will be given of the high-pT-physics highlights from the Run I of the LHC. ATLAS and CMS have an extensive physics program of high-precision measurement and searches for physics beyond the Standard Model. The talk will cover Higgs boson, electroweak physics and top quark physics, as well as searches for hints of new phenomena that attempt to address the open questions we are...
Prof.
Ilja Doršner
(University of Split)
07/04/2015, 09:28
Planary Talk
I will address implications of large lepton-quark-leptoquark couplings for direct leptoquark searches at Large Hadron Collider. It will be shown that flavour physics constraints allow for sizeable couplings of leptoquarks to the Standard Model fermions if these interact exclusively with charged leptons and quarks of the same generation. The leptoquark production mechanisms at LHC will be...
Alejandro de la Puente
(TRIUMF)
07/04/2015, 10:14
Planary Talk
We study the collider signatures of a long-lived massive colored scalar transforming trivially under the weak interaction and decaying within the inner sections of a detector such as ATLAS or CMS. In our study, we assume that the colored scalar couples at tree-level to a top quark and a stable fermion, possibly arising from a dark sector or from supersymmetric extensions of the Standard Model....
Thomas Mannel
(Siegen University)
07/04/2015, 11:05
Planary Talk
I will review a few recent result in the field of semileptonic decays of bottom and charm hadrons, including both exclusive as well as inclusive decays.
Dr
Kristopher Healey
(Università di Torino)
07/04/2015, 11:28
Planary Talk
Including the recently computed O(α ΛQCD^2}/mb^2) corrections, we perform an extraction of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb and the most relevant parameters of the heavy quark expansion from the data of inclusive semileptonic B decays. Using a recent determination of the charm quark mass, we obtain |Vcb|=(42.21±0.78)×10^{-3} and the bottom quark mass in the...
Javier Virto
(Universitat Siegen)
07/04/2015, 11:51
Planary Talk
Three body non-leptonic decays of B mesons have been studied at B factories and at the LHC, and will become a benchmark for flavor and CP studies at Belle II. I will discuss the QCD properties of three body hadronic B decays in the different regions of phase space and their interconnection, matching the different factorization descriptions in each regime, in an attempt to reconstrunct the...
Robert Fleischer
(CERN)
07/04/2015, 12:14
Planary Talk
Measurements of CP violation in $B^0_d\to J/\psi K_{\rm S}^0$ and $B^0_s\to J/\psi \phi$
decays play key roles in testing the quark-flavour sector of the Standard Model. The
theoretical interpretation of the corresponding observables is limited by uncertainties from
doubly Cabibbo-suppressed penguin topologies. With continuously increasing experimental
precision, it is mandatory to get a...
Andreas Crivellin
(CERN)
07/04/2015, 14:30
Planary Talk
By now the LHC found three deviations from the SM expectations in the flavour sector: B->K*mumu, B->Kmumu/B->Kee and h->taumu. I discuss a 2HDM with ganged Lmu-Ltau and vector-like quarks which can explain these anomalies. Charging also the baryons under a new U(1)' symmetry, the introduction of vector-like quarks can be avoided and interesting correlations with LHC searches arise.
Joachim Brod
(Johannes-Gutenberg-Universitaet Mainz)
07/04/2015, 15:16
Planary Talk
In this talk I present direct and indirect constraints on the interaction of the Higgs boson with electrons and light quarks. In addition, I briefly discuss the size of deviations from standard-model predictions that are expected in different models of flavor, and the impact on dark-matter direct detection.
Tilman Plehn
(Heidelberg University)
07/04/2015, 15:39
Planary Talk
Already during the last run of the LHC the measurement of Higgs couplings
has played a key role in understanding the nature of the observed resonance.
I will review the main results, discuss their challenges on the experimental
and theoretical side, and discuss first tests of possible analyses during
Run2. They main challenge will be to properly interpret Higgs measurements
in terms of an...
Daniel Litim
07/04/2015, 16:30
Planary Talk
We study the high-energy behaviour of interacting non-Abelian
gauge fields, fermions, and scalars. In a regime where asymptotic
freedom is absent, we find that the three types of fields cooperate
to develop an interacting UV fixed point, strictly controlled by
perturbation theory. The key features of asymptotic safety for
UV model building and particle phenomenology are discussed.
Alejandro Celis
(IFIC CSIC-Universitat de Valencia)
07/04/2015, 16:53
Planary Talk
The Peccei-Quinn mechanism is perhaps the most compelling solution we have for the strong-CP problem. The mechanism predicts the existence of a pseudo-Goldstone boson, the axion, which could account for the dark matter content of the Universe. The smallness of active neutrino masses can also be explained in axion models via a type-I see-saw mechanism, providing a dynamical origin for the...
Bohdan Grzadkowski
(University of Warsaw)
07/04/2015, 17:16
Planary Talk
We extend the two-Higgs doublet models of Type I and Type II by adding a real gauge-singlet scalar S which is the Dark Matter (DM) candidate (2HDMS models). We impose theoretical constraints derived from perturbativity, stability, unitarity and correct electroweak symmetry breaking and require that one of CP-even Higgs bosons fit the LHC data for the ∼125.5 GeV state at the 68%~C.L. after...
Ramona Groeber
(INFN)
07/04/2015, 17:39
Planary Talk
In this talk I will discuss weak-scale extensions of the Standard Model which automatically preserve the accidental and approximate symmetry
structure of the Standard Model and which are hence invisible to indirect low-energy probes. By requiring the consistency of the effective field
theory up to scales of $\Lambda_{eff}=10^{15}$ GeV and after applying cosmological constraints, there is...
Admir Greljo
(Institute Jozef Stefan)
08/04/2015, 09:46
Planary Talk
We define a set of pseudo-observables characterizing the properties of Higgs decays in generic extensions of the Standard Model with no new particles below the Higgs mass. The pseudo-observables can be determined from experimental data, providing a systematic generalization of the "kappa-framework" so far adopted by the LHC experiments. The pseudo-observables are defined from on-shell decay...
Oleg Lebedev
(University of Helsinki)
08/04/2015, 10:09
Planary Talk
I will discuss the role of the Higgs field as a probe of the hidden sector and its implications for cosmology.
Dr
Gabrijela Zaharijas
(University of Nova Gorica)
08/04/2015, 11:00
Planary Talk
The quest to detect the non-gravitational signals from dark matter particles is now more than 50 years old and is reaching its culmination with the latest generation detectors. In this talk I will review most recent results from the so called indirect searches, which look for dark matter signals in the rich astrophysical data.
Junji HISANO
(Nagoya university)
08/04/2015, 11:28
Planary Talk
We complete the calculation of the wino-nucleon scattering
cross section up to the next-to-leading order in α_s. As a result, the
uncertainties coming from the perturbative QCD are significantly
reduced to be smaller than those from the nucleon matrix elements. The
resultant scattering cross section is found to be larger than the
leading-order one by about 70%, which is well above the...
Andrea De Simone
(SISSA)
08/04/2015, 11:51
Planary Talk
I will give an overview of the present status of dark matter searches at the LHC. I will discuss the validity of the effective field theory approach and the possible search strategies for getting the most out of the next collider run.
Joachim Kopp
(University of Mainz)
08/04/2015, 12:14
Planary Talk
We show that the high energy events observed in the IceCube detector - usually interpreted as evidence for an astrophysical neutrino flux - could also be a signal of highly boosted dark matter particles scattering on nucleons. This scenario is for instance realized in models featuring a superheavy DM particle which decays into a much lighter dark sector species. We show that, besides...
Stefan Pokorski
(University of Warsaw (PL))
08/04/2015, 14:30
Planary Talk
Motivated by the absence, so far, of any signal for the coloured supersymmetric particles, we focus on the possibility that the electroweak sector
may play the leading role in discovering supersymmetry. So far, the interest in the supersymmetric electroweak sector has often been linked to the
fact that the LSP might account for the observed Dark Matter in the universe. The new LHC and...
Robert Ziegler
08/04/2015, 14:53
Planary Talk
I will discuss a simple and predictive model that combines the NMSSM and Gauge Mediation. Originally proposed by Delgado, Giudice and Slavich, we have re-analyzed this model and found new interesting regions in the parameter space with a light singlet state that mixes with the SM-like Higgs at 125 GeV. This mixing is small enough to evade LEP and LHC constraints, but large enough to give a...
Marco Fabbrichesi
(INFN/SISSA)
08/04/2015, 15:16
Planary Talk
The idea of naturalness, in its original version, refers only to the finite renormalisation of the Higgs boson mass induced by the introduction of heavier states. It is still a powerful heuristic principle in model building beyond the SM. A compelling case is provided by the generation of neutrino masses. The right-handed sector responsible for the seesaw mechanism is made supersymmetric to...
Amon Ilakovac
(Univ. of Zagreb)
08/04/2015, 15:39
Planary Talk
The results for anomalous dipole moment and electric
dipole moment are presented in the MSSM extended by
low scale heavy neutrinos. The analysis of possible
contributions is presented, and found that the CP phase
originates only for additional phase introduced in the model,
leading to the electron EDM that can be observed in future
experiments.
Alan Schwartz
(University of Cincinnati)
08/04/2015, 16:30
Planary Talk
We review recent results in heavy flavor decays from the Belle
, BaBar,
and LHCb experiments. These measurements range from mixing
parameters
to CKM phases to various observables in electroweak penguin
decays. The
results are sensitive to new physics and thus constrain exte
nsions to the Stan-
dard Model. Several inconsistencies between measured valu
es and Standard
Model...
Alexander Khodjamirian
(University of Siegen)
08/04/2015, 16:58
Planary Talk
I will present new results
on the theory of the rare flavour-changing neutral-current
decay $B\to \pi\ell^+\ell^-$ in the region of large recoil of the pion.
Nonlocal hadronic effects
in this decay are treated in a systematic way, combining QCD calculation with hadronic
dispersion relation including the vector meson contributions.
The effective addition to the Wilson coefficient $C_9$...
Roman Zwicky
(edinburgh university)
08/04/2015, 17:21
Planary Talk
I will discuss recent progress on B->V form factors. This will for instance include the use of the equation of motion in reducing the uncertainty of tensor-to-vector form factors.
The latter is of primary importance for the zero crossing of helicity amplitudes which has major impacts on angular observables. I will discuss the impact of cc-resonances on
determination of angular observables.
Sebastian Jaeger
(University of Sussex (GB))
08/04/2015, 17:44
Planary Talk
I will discuss the problems and opportunities in disentangling SM and BSM effects in
rare semileptonic and radiative decays, including electronic final states and
lepton universality-violating observables. I will contrast SM and BSM
effects in the context of (i) the LHCb anomaly, (ii) the search for right-handed
currents, and (iii) lepton-universality violation.
Dr
Luca Di Luzio
(Genoa University and INFN, Genoa)
09/04/2015, 09:00
Planary Talk
I will discuss few minimal scalar extensions of the standard electroweak model that provide a simple setup for massive neutrinos in connection with an invisible axion. The presence of a chiral U(1) a la Peccei-Quinn drives the pattern of Majorana neutrino masses while providing a dynamical solution to the strong CP problem and an axion as a dark matter candidate. Such a renormalizable...
Michal Malinsky
(IPNP, Charles University in Prague)
09/04/2015, 09:23
Planary Talk
I will review the recent progress in the attempts to improve the accuracy of the existing proton lifetime estimates in the realm of the minimal non-supersymmetric SO(10) grand unified model and argue that a significant portion of its parameter space consistent with all existing constraints may be testable at the existing or near future experimental facilities.
Timon Mede
(IPNP, Prague)
09/04/2015, 09:46
Planary Talk
The minimal renormalizable supersymmetric SU(5) GUT model has long been proclaimed ruled out on the account of colour Higgs triplet being either too heavy to allow for the gauge coupling unification or too light to satisfy the proton decay bounds. We have managed to prove that for large trilinear supersymmetry breaking terms and only a slightly heavier superpartner spectrum the perturbative...
Vasja Susič
(Jožef Stefan Institute)
09/04/2015, 10:09
Planary Talk
We explicitly show that the model with a Higgs breaking sector 27 + 27bar + 351' + 351'bar + 78 provides a realistic scenario for an E6 SUSY Grand Unified Theory. Although the 78 is not necessary for obtaining a Standard Model vacuum, doublet-triplet splitting cannot be performed in the simplified case, where the 78 is omitted. We study in detail the Yukawa sector of the model, where three...
Dr
Fabrizio Nesti
(Rudjer Boskovic Institute)
09/04/2015, 11:00
Planary Talk
I describe the way in which the mechanism responsible for the origin of neutrino masses may manifest itself as striking Lepton Number Violating decays of the Higgs. Majorana neutrinos in the tenths of GeV mass range, together with currently allowed nonstandard Higgs couplings leave ample space for this possibility, which can probe a scale of neutrino mass generation as high as ~20 TeV.
Roberto Franceschini
(CERN)
09/04/2015, 11:46
Planary Talk
In this talk I will briefly review the present status and motivations for an accurate measurement of the top quark mass. In particular I will outline future strategies and possible outcomes for a global combination of top quark masses measurement at hadron colliders. I will discuss the role that new types of measurement can play to clarify the issues of present precision top quark...
Sacha Davidson
(Universite Claude Bernard-Lyon I (FR))
09/04/2015, 12:09
At the LHC, New Physics could be better parametrised with form factors than with contact interactions, if the New Physics scale is similar to the LHC energy. As a toy example, I consider the process pp -> l+l- , fit the high-energy tail to a function, and show that the resulting limits can be analytically translated to a wide variety of models (no event simulation required).
Wolfgang Altmannshofer
(Perimeter Institute)
09/04/2015, 14:30
Planary Talk
I will present results of global fits of all relevant experimental data on rare b-->s decays. Significant tensions between the Standard Model predictions and the data are observed that could be explained by unexpectedly large hadronic effects or by new physics.
Assuming hadronic uncertainties are estimated in a sufficiently conservative way, I will discuss the implications of the experimental...
Gudrun Hiller
(Technische Universitaet Dortmund (DE))
09/04/2015, 14:53
Planary Talk
Lepton-nonuniversality in rare b decays provides opportunities to
diagnose BSM physics at the weak scale. We discuss correlations
and give directions for flavor patterns in model-specific realizations with leptoquarks.
Marco Nardecchia
09/04/2015, 15:16
Planary Talk
I will discuss the possibility to explain recent anomalies in semileptonic B decays at LHCb via a composite Higgs model, in which both the Higgs and a triplet leptoquark arise as pseudo-Goldstone bosons of the strong dynamics. Fermion masses are assumed to be generated via the mechanism of partial compositeness, which largely determines the leptoquark couplings and implies non-universal lepton...
Avelino Vicente
(Université de Liège)
09/04/2015, 15:39
Planary Talk
The LHCb collaboration has recently reported on some anomalies in $b
\to s$ transitions. In addition to discrepancies with the Standard
Model (SM) predictions in some angular observables and branching
ratios, an intriguing hint for lepton universality violation was
found. Here we propose a simple model that extends the SM with a dark
sector charged under an additional $U(1)$ gauge...
Werner Rodejohann
(MPIK, Heidelberg)
09/04/2015, 16:30
Planary Talk
Physics implications of neutrinoless double beta decay are summarized. Both the standard approach of light neutrino exchange as well as non-standard interpretations in terms of TeV scale physics will be discussed. Tests of the mechanisms at colliders and with lepton flavor violation are presented. It is pointed out that left-right symmetric mechanisms can have testable consequences also in...
Prof.
Ivica Picek
(University in Zagreb)
09/04/2015, 16:53
Planary Talk
We propose a three-loop radiative neutrino (R\nu) mass model realized with BSM fields,
including minimal-dark-matter (MDM) candidates. These, in conjunction with the 2HDM fields
on top of which the model is built, lead to an accidental Z_2 symmetry protecting the fermion
quintuplet as a DM candidate. We assess the potential fingerprints of the Majorana quintuplet
on present and future pp colliders.
Diego Aristizabal
(Universite de Liege)
09/04/2015, 17:16
Planary Talk
Majorana neutrino masses can originate either at the tree level
(type-I, II or III seesaws) or can be radiatively induced. The latter
option naturally requires order TeV BSM fields, thus leading to
testable neutrino mass generation mechanisms. Based on a two-loop
systematic classification of the dimension five effective Weinberg
operator, in this talk I will discuss the different...
Benoit Schmauch
(IPhT)
09/04/2015, 17:39
Planary Talk
Leptogenesis is an appealing framework to explain the baryon asymmetry of the universe. In its standard realization involving right-handed neutrinos, it has been shown that, if right-handed neutrinos are hierarchical, the flavour structure of Boltzmann equations describing the evolution of the lepton asymmetry simplifies a lot. When the charged lepton Yukawa are negligible, that is when the...
Martin Jung
(TU Dortmund)
10/04/2015, 09:00
Planary Talk
We investigate the constraints on Two-Higgs-Doublet Models stemming from precision measurements of tree-level decays. We focus on leptonic and semileptonic meson decays, but also consider bounds from recent searches at ATLAS and CMS.
Ivan Nisandzic
(TU Dortumd)
10/04/2015, 09:23
Planary Talk
Current experimental information on the charm meson decay observables in which the $c\to s\ell\nu_\ell$ transitions occur is well compatible with the Standard Model (SM) predictions. Recent precise lattice calculations of the $D_s$ meson decay constant and form factors in $D \to K \ell\nu$ decays offer a possibility to search for the small deviations from the SM predictions in the next...
Alexey Petrov
(Wayne State University)
10/04/2015, 09:46
Planary Talk
Lepton flavor-violating processes offer interesting possibilities to probe new physics at multi-TeV scale. We discuss those in the framework of effective field theory, emphasizing the role of gluonic operators. Those operators are obtained by integrating out heavy quarks that are kinematically inaccessible at the scale where low-energy experiments take place and make those experiments...
Ulrich Nierste
(Karlsruhe Institute of Technology (KIT))
10/04/2015, 10:09
Planary Talk
The standard way to measure the CP phases $2\beta$ and $2\beta_s$ uses $B_{d,s}$ decays into charmonium. The theoretical precision is limited by the unknown penguin contribution to the decay amplitude. I show that this contribution can be expressed in terms of the same matrix elements which
constitute to the dominant tree amplitude. The second part of my talk
addresses a global analysis of D...
Christopher Smith
(L)
10/04/2015, 11:00
Planary Talk
Several aspects of the MFV implementation in the presence of global U(1)
flavor symmetries will be discussed. Some generic implications for baryon
number violation, lepton number violation and Majorana mass terms, and axion
dynamics will be drawn.
Jan O. Eeg
(University of Oslo)
10/04/2015, 11:23
Planary Talk
I comment shortly on various mechanisms for electric dipole moments. I also comment on recent calculations of two loop diagrams for electric dipole moments generated by flavor changing scalars.
Pietro Colangelo
(Unknown)
10/04/2015, 11:46
Planary Talk
Rare b decays are investigated in the Randall Sundrum model with
custodial symmetry. Correlations among the observables are studied,
and predictions for unobserved modes are presented.
Andrzej Buras
(Munich)
10/04/2015, 12:09
Planary Talk
I will report on recent analyses of rare K and B decays done at TUM-IAS which with improved data should provide in this decade some insight into the dynamics at the LHC scales and beyond them.
