Bulletin of the American Physical Society
2009 APS April Meeting
Volume 54, Number 4
Saturday–Tuesday, May 2–5, 2009; Denver, Colorado
Session R12: Mini-Symposium on Heavy Flavor: Future of Heavy Flavor Physics |
Hide Abstracts |
Sponsoring Units: DPF Chair: Thomas Ruf, CERN Room: Plaza Court 2 |
Monday, May 4, 2009 1:30PM - 1:42PM |
R12.00001: Measurement of the Differential Production Cross Section of $J/\Psi\rightarrow\mu^+\mu^-$ in Proton-Proton Collisions at $\sqrt{s}=$~10~TeV with Simulated Data Yu Zheng, Ian Shipsey We present several methods for measuring the differential production cross section of $J/\Psi \rightarrow\ mu^+\mu^-$ in proton-proton collisions at $\sqrt{s}=$~10~TeV, using simulated samples of $J/\Psi$ corresponding to data to be collected in the first LHC run by the CMS detector. We show the reconstruction and trigger performance of the CMS detector for single muons and $J/\Psi \rightarrow \mu^+ \mu^-$, discussing reconstruction efficiencies and trigger efficiencies. We also separate prompt $J/\Psi$ from those produced in the decay of B-hadrons by exploiting the long lifetime of beauty particles. About thirteen thousand reconstructed prompt $J/\Psi$ events pass the dedicated $J/\Psi$ trigger in a simulated data sample corresponding to an integrated luminosity of 1~pb$^{-1}$. [Preview Abstract] |
Monday, May 4, 2009 1:42PM - 1:54PM |
R12.00002: An overview of the b-Tagging algorithms in the CMS Offline software Jeffrey Garberson The CMS Offline software contains a widespread set of algorithms to identify jets originating from the weak decay of b-quarks. Different physical properties of b-hadron decays like lifetime information, secondary vertices and soft leptons are exploited. The variety of selection algorithms range from simple and robust ones, suitable for early data-taking and online environments as the trigger system, to highly discriminating ones, exploiting all the information available. [Preview Abstract] |
Monday, May 4, 2009 1:54PM - 2:30PM |
R12.00003: Prospects for B Physics at the LHC Invited Speaker: The LHC is not only a machine for the high energy frontier but also a super b-factory. I will review the theoretical background how b-physics, i.e. flavour physics in general, can help to detect and explore new physics in a complementary way compared to direct searches. Discuss the challenges of b-physics at an hadron collider and how the experiments deal with it. Expected results with first data and long term perspective are also presented. [Preview Abstract] |
Monday, May 4, 2009 2:30PM - 2:42PM |
R12.00004: Search for $\xi(2230)$ in Radiative $J/\psi$ Decays Bertrand Echenard A search has been made for $\xi(2230)$ production in radiative $J/\psi \to \gamma K^+K^-$ and $J/\psi \to \gamma K_sK_s$ decays. This search is performed on 464~fb$^{-1}$ of data collected at $e^+e^-$ center-of-mass energies between 10.54-10.58 GeV with the {\sl B{\scriptsize A}B{\scriptsize AR}} detector at the PEP-II storage rings. The $\xi(2230)$ is reconstructed through the decays $\xi(2230)\to K^+K^-$ and $\xi(2230)\to K_sK_s$. Preliminary results on these studies will be presented. [Preview Abstract] |
Monday, May 4, 2009 2:42PM - 2:54PM |
R12.00005: Feasibility study for measuring $J/\Psi$ polarization using early LHC data collected with the CMS detector Zhen Hu, Eric James, Sijin Qian We present a feasibility study for measuring the polarization of prompt $J/\Psi$ mesons produced in proton-proton collisions at $\sqrt{s} = $~10~TeV as a function of the $J/\Psi$ transverse momentum. The study is based on simulated samples of $J/\Psi$ candidate events corresponding to 1~pb$^{-1}$ of data expected to be collected by the CMS detector in early LHC running. We use Monte Carlo pseudo-experiments to study potential biases in the fit procedure used to extract the polarization parameter, $\alpha$, and in the determination of our expected sensitivity. These measurements are expected to provide some insight into the current observed disagreement between the non-relativistic QCD theory and recent CDF $J/\Psi$ polarization measurements made using data collected at the Tevatron collider. [Preview Abstract] |
Monday, May 4, 2009 2:54PM - 3:06PM |
R12.00006: $V^{0}$ Reconstruction in the CMS Tracking Detector Brian Drell The reconstruction of neutral $K$ mesons and $\Lambda$ baryons is required by a variety of analyses in CMS, including $B$-tagging, particle flow, and $B$ physics analyses. A module within the CMS computing framework has been developed for the fast and efficient reconstruction of $V^{0}$ particles using charged tracks from the CMS tracking detector at LHC. This talk will outline the vertex reconstruction method used and will present a summary of our approach to improving computing time and reconstruction efficiency. I will also present an approach to increasing $V^{0}$ reconstruction efficiency by improving the tracking efficiency of particles originating from positions displaced from the beam axis. [Preview Abstract] |
Monday, May 4, 2009 3:06PM - 3:18PM |
R12.00007: Feasibility Study of the Measurement of the Differential Production Cross Section of $\Upsilon\rightarrow\mu^+\mu^-$ with the CMS detector in Early LHC Data Zoltan Gecse, Ian Shipsey We present a feasibility study of the measurement of the differential production cross-section of $\Upsilon\rightarrow\mu^+\mu^-$ in early proton-proton collision data produced by the LHC accelerator at $\sqrt{s}=$~10~TeV and collected by the CMS detector. About two thousand reconstructed $\Upsilon\rightarrow\mu^+\mu^-$ decays are expected to pass the di-muon trigger per 1~pb$^{-1}$ of data, providing a statistically significant signal sample. The $\Upsilon$ resonance also provides the set of muons used to measure the reconstruction and trigger efficiencies in the low transverse momentum range. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700