Physics in Collision 2010

1 Sept 2010, 08:00 → 4 Sept 2010, 14:00 Europe/Zurich

KIT

Thomas Muller (Institut fuer Experimentelle Kernphysik, KIT)

This is the 30th international symposium on Physics in Collision which started in 1981. The conference takes place from 1-4 September 2010 at KIT (Karlsruhe), Germany.

The conference covers the following topics:

• Electroweak
• Heavy Flavour
• QCD
• Searches
• Neutrino Physics
• Astroparticle Physics

All details can be found on the conference webpage www.pic2010.kit.edu

Wednesday, 1 September

08:00 → 09:00 Registration

09:00 → 09:10 Welcome address

Speaker: Prof. Thomas Muller (IEKP Universitaet Karlsruhe (TH))

09:10 → 09:25 Tribute to Rich Galik

Speaker: Roy Briere (Carnegie Mellon University)

Slides Galik_Memorial.pdf

09:30 → 10:15 ATLAS & CMS A

Reports on status

09:30 ATLAS 1: Status Report and Performance for Physics Objects

Speaker: Lucia Masetti (Institut fur Physik)

Slides ATLAS_Status_Performance.pdf

09:55 CMS 1: CMS status and physics objects results

Speaker: Lucia Silvestris (Istituto Nazionale di Fisica Nucleare (INFN))

Slides PIC_01_Sep_2010_LuciaS.pdf

10:20 → 10:35 Coffee

10:40 → 11:35 ATLAS & CMS B

Reports on first physics results

10:40 CMS 2: CMS result with collision data

Speaker: Nadia Pastrone (INFN)

Slides PIC2010-Pastrone.pdf PIC2010-Pastrone.ppt

11:10 ATLAS 2: Latest Results

Speaker: Dr Brian Petersen (CERN)

Slides AtlasResults.pdf

11:40 → 12:35 Electroweak A

Top-Physics

11:40 Top Quark Production at the Tevatron

Speaker: Erich Varnes (University of Arizona)

Slides Varnes_PIC.pdf

12:10 Top Quark Properties (CDF + DØ)

Speaker: Thomas Schwarz (University of California Davis)

Slides PIC_2010_Schwarz.pdf

12:40 → 13:55 Lunch

14:00 → 14:40 Electroweak B

W/Z-Physics

14:00 W/Z Production and Properties (CDF + DØ)

Speaker: Prof. Florencia Canelli (University of Chicago and Fermilab)

Slides canelli_PIC2010.pdf canelli_PIC2010.pptx

14:45 → 16:10 Heavy Flavour A

B-Physics, new physics searches at B-factories

14:45 CP Violation from B-decays

Speaker: Prof. Youngjoon Kwon (Yonsei University)

Slides kwon_PIC2010.pdf

15:15 B Decays & CKM Physics

Speaker: Steven Robertson (High Energy Physics Group-McGill University-Unknown)

Slides robertson.pdf

15:45 New Physics Searches at the B-factories

Speaker: Mathew Graham (SLAC)

Slides PIC-NewPhysics-Sept2010.pdf

16:15 → 16:35 Coffee

16:40 → 18:50 Heavy Flavour B

non 4S Upsilon decays, D Physics, Charmonium Physics

16:40 Non-4S Upsilon Decays in B-Factories

Speaker: Galina Pakhlova (ITEP)

Slides G.Pakhlova_pic_01.09.2010.pdf G.Pakhlova_pic_01.09.2010.ppt

17:10 D Mixing and Decay

Speaker: Anze Zupanc (KIT)

Slides zupanc_pic2010.pdf

17:55 D Decay Using Quantum Correlations

Speaker: Werner Man-Li Sun (Cornell University-Unknown-Unknown)

Slides pic10_sun.pdf

18:25 Charmonium Physics

Speaker: Zhengguo Zhao (University of Science and Technology of China)

Slides PIC2010_ZhaoZG.pdf

19:00 → 22:00 Reception in the castle

Thursday, 2 September

08:30 → 09:55 Heavy Flavour C

exotic hadrons, B-Physics

08:30 Exotic Hadrons

Speaker: Francesco Renga

Slides renga_PIC2010.pdf

09:00 Heavy B States and rare Decays at the Tevatron

Speaker: G. Fisk (FNAL)

Slides Karlsruhe_PIC_9_01_10_1745hrs.pdf Karlsruhe_PIC_9_01_10_1745hrs.ppt

09:30 Bs Physics (CDF, DØ + Belle)

Speaker: Thomas Kuhr (Institut fuer Experimentelle Kernphysik)

Slides Kuhr.pdf

10:00 → 10:40 Poster Presentations A

Short Talks on selected Posters

10:00 Commissioning and Performance of the CMS Electromagnetic Calorimeter

The operation and general performance of the CMS electromagnetic calorimeter at sqrt{s} = 7 TeV are described. The first LHC beams have been used to finalize the commissioning of ECAL readout and trigger. The precision of the inter-channel synchronization and calibration has been verified and improved with collision data, exploiting decays of pi0s and eta into two photons, the phi invariance of the energy deposition in Minimum Bias events. Di-electron and di-photon states have been also used to verify and tune the energy scale. The quality of the offline data reconstruction, from low level quantities to showers, has been investigated and improved using known physics processes. Collision data and thorough Data/MC comparisons have been used to measure and tune the detector performance. First performance results are given.

Speaker: Eleni Petrakou (Nat. Cent. for Sci. Res. Demokritos (NRCPS))

Slides PIC2010_Intro_presentation_Petrakou.pdf PIC2010_Intro_presentation_Petrakou.pptx

10:08 Performance of the ATLAS Trigger Reconstruction for Minimum Bias Events, Jets, and Missing Transverse Energy in pp-collisions at sqrt{s} = 7 TeV

Since the restart of the LHC, ATLAS has successfully recorded data at sqrt{s} = 0.9 and 7 TeV. The ATLAS trigger strategy realised a step-wise activation of the three level trigger system, starting with hardware-based first-level (L1) triggers and moving with increasing luminosities to the deployment of the software-based high-level triggers (HLT). We will present L1 and HLT triggers and their performance on 7 TeV collision data, whose use case range from the measuremens of inelastic charged particle spectra to new physics searches. We will focus on triggers selecting inelastic pp-collsions (minimum bias), missing transverse energies (missing E_{T}), jets and bjets. Different minimum bias triggers based of central tracking and forward detector components, their efficiencies as well as possible biases are presented. We highlight missing E_{T} triggers, which require the magnitude of the vector sum of all transverse energies to exceed some threshold. While look-up-tables allow fast trigger decisions at L1, the full calorimeter signal is accessed at HLT to make a more precise estimate on missing E_{T}. We also outline the performance of various jet triggers, showing results for inclusive, dijet, and multijet efficiencies at L1 and HLT. Furthermore, results on the performance of bjet trigger algorithms are presented, allowing for b-meson identification at HLT.

Speaker: Ms Regina Kwee (CERN/Humboldt University of Berlin)

Poster posterPIC2010.pdf

Slides Kwee_2Sept2010.pdf

10:16 Measurement of W and Z boson production in pp at sqrt(s) = 7 TeV with the ATLAS detector

The first measurement of the production cross-sections for W and Z bosons in proton proton interactions at sqrt(s) = 7 TeV are reported from the ATLAS experiment. Based on its excellent capability for reconstructing both high pT electrons and muons, the electron and the muon decay modes of the W/Z bosons are compared. First results for the ratio of W/Z production and of W+/W- production will also be described.

Speaker: Verena Ingrid Martinez Outschoorn (Harvard University)

Slides verena_pic_poster_ad.pdf

10:24 Inclusive b-jet production measurement on early CMS data

We describe a measurement of the inclusive b-jet production in pp collisions at sqrt(s) = 7 TeV. The analysis has been done on the first physics data collected by the CMS experiment at the Large Hadron Collider at CERN. To improve the low p_T measurement, the jets are reconstructed with the Particle Flow algorithm. The experimental uncertainties from jet energy corrections, jet energy resolutions and luminosity are reduced by taking a ratio to the inclusive jet production cross section. We're using a simple secondary vertex high purity tagger, which is one of the most reliable b-taggers for this early measurement, for selecting a jet sample with high b-jet purity. To measure the b fractions in the tagged jet data sample, we made a template fit to the secondary vertex mass. Our estimation of the b-tagging efficiency is taken from Monte Carlo simulation. Thus our studies on LO+NLO contributions from flavor creation, flavor excitation and gluon splitting are shown as well.

Speaker: Daniel Martschei (Inst. fuer Experimentelle Kernphys.-Universitaet Karlsruhe-Unkno)

Poster inclusiveb_new_pic.pdf

Slides inclBPosterPIC2010.pdf

10:32 Tevatron Combination of Single Top Quark Production

After the first observation of the inclusive single top-quark production in the s- and t-channels by both CDF and D0, the Tevatron collaborations combined their measurements using the distributions of their multivariate discriminants. A Bayesian analysis is used to extract the cross section at a center of mass energy of 1.96 TeV from 3.2/fb (CDF) and 2.3/fb (D0) of data, respectively. For a top quark mass of 170 GeV/c^2, a cross section of 2.76 +0.58 -0.47 pb is extracted while the CKM matrix element |V_tb| is measured to be 0.88 ± 0.07 with a 95% C.L. lower limit of |V_tb| > 0.77.

Speaker: Dr Jan Lueck (EKP)

Slides PIC_lueck.pdf

10:45 → 11:15 Coffee and Posters

11:20 → 12:45 Heavy Flavour D

K-Physics, heavy flavour at LHC

11:20 Kaon Physics

Speaker: Evgueni Goudzovski (University of Birmingham)

Slides goudzovski-pic2010.pdf

12:05 Heavy Flavour Physics Results at the LHC

Speaker: Gaia Lanfranchi (Istituto Nazionale di Fisica Nucleare (INFN))

Slides PIC2010_lanfranchi_v2.pdf

12:50 → 13:55 Lunch

14:00 → 14:40 Heavy Flavour E

heavy flavour theory

14:00 Heavy Flavour Theory

Speaker: Gilad Perez (Weizmann Institute)

Slides Gilad_Perez_PIC10.pdf

14:45 → 16:10 QCD A

structure functions

14:45 HERA Structure Function Measurement

Speaker: Katerina Lipka (DESY Hamburg)

Slides lipkaPIC10.pdf

15:30 Spin Structure Functions

Speaker: Klaus Rith (University of Erlangen)

Slides pic10-rith-short.pdf

16:15 → 16:30 Coffee

16:35 → 19:15 QCD B

precision QCD, high Et jets, non-perturbative QCD, low energy QCD

16:35 Precision QCD Test and Measurement of αs

Speaker: Ian Brock (Physikalisches Institut)

Slides PIC2010_brock_QCD.pdf

17:20 High Et Jet Physics at the Tevatron

Speaker: Thomas Nunnemann (LMU Munich)

Slides pic10_jets_v2.pdf

18:05 Non-perturbative phenomena in strong interactions

Speaker: Marcella Capua (Dipartimento di Fisica-Univ. degli Studi della Calabria-Unknown)

Slides CapuaPIC10.pdf

18:35 Low Energy QCD at LHC

Canceled

Speaker: Johannes Wessels (Institut fuer Kernphysik-Westfaelische Wilhelms-Universitaet Mun)

Friday, 3 September

08:30 → 09:10 QCD C

QCD theory

08:30 QCD Theory

Canceled

Speaker: Walter Giele (Fermilab)

09:15 → 09:55 Searches A

Higgs searches

09:15 Higgs Searches at the Tevatron

Speaker: Satish Desai (Fermilab)

Slides higgs-tev.pdf

10:00 → 10:40 Poster Presentations B

Short Talks on selected posters

10:00 The ALICE Silicon Strip Detector performances during the first LHC data taking.

The Silicon Strip Detector (SSD) is a fundamental part of the Inner Tracking System (ITS) for the ALICE experiment. Since the early phase of p-p collisions at LHC, the SSD is fully operational and participating in the charged particle detection and identification carried out by ALICE. The performance of the SSD during the 900 GeV and 7 TeV collision data taking is presented here. The stability of the system is monitored through the time evolution of its calibration parameters and their correlation with the environmental conditions. The intrinsic noise of the 2.6 million channels composing the SSD is used to assess the detector efficiency. Finally the performances in terms of hit reconstruction and energy-loss measurement are discussed with reference to the global tracking and the ITS-standalone particle identification carried out in the first collision events.

Speaker: Giacomo Contin (Dipartimento di Fisica-Universita degli Studi di Trieste / INFN Sezione di Trieste)

Slides PIC2010.Contin.PosterTalk_v1.1.pdf

10:08 Search for CP-violating charge asymmetry in B^+ -> J/psi K^+ decays

We present a result of search for CP-violating charge asymmetry in B^+ -> J/psi K^+ decays using 772x10^6 B anti-B meson pairs collected with the Belle detector at the KEKB asymmetric energy e^+ e^− collider. The result supersedes our previous measurement and represents the most sensitive measurement up to date.

Speaker: Mr Kazuyuki Sakai (Niigata University (Japan))

Slides Sakai_Poster_oral.pdf

10:16 Search for the lepton-number-violating decay B->Dl+l+ at Belle

In the Standard Model, lepton-number-violating decays such as $B^+ \to D^- \ell^+ \ell^+$ is strictly forbidden, but they are allowed if there exist Majorana-type neutrinos.  In this poster, we report a first search for $B^+ \to D^- \ell^+ \ell^+$ ($\ell = e$ or $\mu$) decays with 772$\times 10^{-6}$ $B \bar{B}$ pairs produced by energy-asymmetric $e^+ e^-$ collision at KEKB accelerator and recorded by the Belle detector.  We measure no events in signal region and obtain upper limits of branching fraction in the order of $10^{-6}$ at the 90\% C.L.

Speaker: Ms Oksu Seon (Nagoya University)

Slides PIC_pdf.pdf

10:24 An improved full reconstruction tool utilizing NeuroBayes

The full reconstruction is an important tool for particle physics at the $B$ factories. By fully reconstructing one of the two $B$ mesons coming from the $\Upsilon (4S)$ resonance (tag side), the 4-momentum of the other $B$ meson (signal side) is immediately known and all remaining tracks in the detector can be associated with this other $B$ meson. The full reconstruction is therefore an important tool for the analysis of semileptonic and other rare $B$ decays including neutrinos, while it can also be used for measuring inclusive branching ratios. The new full reconstruction tool was developed for the Belle experiment at the KEK-B collider. The program was written from scratch, heavily utilizing the mulitvariate analysis software package NeuroBayes. With the addition of this more sophisticated analysis technique and the addition of several reconstruction channels for the tag side, an improvement in efficiency of more than 100\% could be achieved. Thus, the new full reconstruction enables many analyses to achieve an increase of a factor 2 in their signal sample.

Speaker: Daniel Zander (Karlsruhe Institute of Technology)

Slides slides.pdf

10:32 Borexino beyond solar neutrinos: Analysis of geo-neutrinos, Pauli exluded transitions of C-12 and cosmogenic backgrounds

The 100t fiducial volume liquid-scintillator experiment Borexino, located at the Laboratori Nazionali del Gran Sasso, is far more than an observatory for solar neutrinos. Its extremely low energy threshold of about 50 keV due to its unprecedented radiopurity also enable to conduct other analyses, i.e. the search for geo-neutrinos, the investigation of the Pauli exclusion principle in Carbon-12 and cosmogenic backgrounds. Geo-neutrinos, i.e. electron anti-neutrinos, are produced in beta-decay chains of U and Th, and in the beta-decay of K-40 abundant in Earth's mantle and crust. They are a unique probe for the interior of the Earth and allow to check geological models. Borexino is the first experiment to observe geo-neutrinos at more than 3 sigma C.L. at a rate of 3.9+1.6−1.3(+5.8−3.2) events/(100 ton yr) [1]. Moreover, the Pauli exclusion principle (PEP) has been tested for nucleons in Carbon-12 [2]. Namely, the non-Paulian transition of 1P3/2-shell nucleons to the filled 1S1/2 shell, emitting γ,n,p,or β±, has been investigated. Due to the extremely low background and the large mass of the Borexino detector, most stringent up-to-date experimental bounds on PEP violating transitions of nucleons could be established. Despite a shielding of about 3800 m.w.e., the residual cosmic muon flux still is a major issue for low background experiments. In fact, these muons can produce neutrons and radionuclides in the detector, forming the so-called cosmogenic background. Both rates and lateral distribution around the muon track can be analysed in Borexino. [1] G. Bellini et al.,Physics Letters B 687 (2010) 299–304 [2] G. Bellini et al.,Phys. Rev.C 81, 034317 (2010)

Speaker: Mr Jürgen Winter (TU München)

Slides PICS2010_winter.pdf

10:45 → 11:05 Coffee and Posters

11:10 → 12:20 Searches B

new physics searches

11:10 Physics beyond the SM (non Higgs) at the Tevatron

Speaker: Dr Christopher Hays (University of Oxford)

Slides pic2010.pdf

11:55 μ → e γ

Speaker: Dr Stefan Ritt (Paul Scherrer Institute)

Slides ritt.pdf ritt.ppt

12:25 → 13:55 Lunch

14:00 → 14:40 Searches C

new physics theory

14:00 New Physics Beyond Standard Model

Speaker: Tilman Plehn (Heidelberg University)

Slides 1_plehn.pdf

14:45 → 16:55 Neutrinos A

solar neutrinos, long baseline and scattering

14:45 Solar Neutrino Physics

Speaker: Aksel Hallin (University of Alberta)

Slides Solar_Neutrinos-_PIC2010.pdf Solar_Neutrinos-_PIC2010.pptx

15:30 Long Baseline Neutrino Oscillation Experiments

Speaker: Dr Alexandre Sousa (Harvard University)

Slides Sousa_LBL_Experiments_PIC2010.pdf

16:15 Neutrino Scattering Measurements

Speaker: Michael Wilking (TRIUMF)

Slides wilking_neutrino_interactions6.pdf

17:00 → 22:00 Excursion to Maulbronn

Sightseeing
Dinner
Music in the cloister

Saturday, 4 September

08:30 → 09:40 Neutrinos B

appearance searches, theory

08:30 Neutrino Appearance Searches

Speaker: Riccardo Brugnera (Universita' di Padova and INFN)

Slides brugnera_pic2010_v02.pdf

09:00 Neutrino Physics Theory

Speaker: Jose Valle

Slides Valle-PIC-2010.pdf

09:45 → 10:25 Astroparticles A

dark matter searches

09:45 Dark Matter Searches

Speaker: Rafael Lang

Slides rafael_pic.pdf rafael_pic.pptx

10:30 → 10:40 Coffee

10:45 → 12:55 Astroparticles B

gamma ray astronomy, neutrino astroparticle physics, UHE cosmics

10:45 Gamma Ray Astronomy

Speaker: Carmelo Sgro' (INFN-Pisa)

Slides sgro_PIC2010.pdf sgro_PIC2010.ppt

11:30 Neutrino Astroparticle Physics

Speaker: Thomas Gaisser (University of Delaware)

Slides Gaisser-PIC-v5.ppt

12:15 Ultra High Energy Cosmics

Speaker: Prof. Francois Montanet (LPSC IN2P3/CNRS Univ. Grenoble)

Slides Montanet_PIC2010.pdf

13:00 → 13:10 PIC 2011 Annoucement

Speaker: Bernd Stelzer (Simon Fraser University-Unknown-Unknown)

Slides pic2010_intro_pic2011vancouver.pdf pic2010_intro_pic2011vancouver.ppt

13:15 → 14:00 Adjorn