Conveners
NB. Particle Physics II
- Craig Group (University of Virginia)
Charles Jenkins
(University of South Alabama)
10/22/11, 8:30 AM
Contributed
The CMS Experiment at the LHC is currently observing 7 TeV center of mass energy pp collisions. One of the many beyond the standard model searches being conducted by CMS is for evidence of a fourth generation top-like quark (t'). If this object exists, it is expected to decay as: t' -> W b. In pp collisions the top-like quark would be produced with its anti-quark (pp -> t' tbar' -> W+ b W-...
Huong Nguyen
(University of Virginia)
10/22/11, 8:42 AM
Contributed
This talk will discuss several techniques employed to increase sensitivities in searches for the standard model Higgs boson at the D0 Experiment, including kinematic fits, matrix element methods, and kinematically motivated divisions of data. Examples from recent data analysis work will be presented.
Luis Lebolo
(Florida International University)
10/22/11, 8:54 AM
Contributed
The Z0 boson center-of-mass angular distribution is measured in proton-proton collisions at sqrt{s} = 7~TeV, at the CERN LHC. The advantage of studying the angular distribution is that the partonic cross section is solely a function of s-hat and cos(theta-hat); it does not depend on the details of the parton distribution functions. The data sample, recorded with the CMS detector, corresponds...
Christopher Frye
(University of Central Florida)
10/22/11, 9:06 AM
Contributed (undergraduate)
The Forward Hadron Calorimeter (HF) of the Compact Muon Solenoid (CMS) at the Large Hadron Collider (LHC) lies in a region not covered by an inner tracking system, and we can rely only on the shapes of showers that hit the HF to determine whether or not they are due to electromagnetic particles. We review the current method of distinguishing shower types in the HF, and we bring attention to a...
Christopher Buchanan
(University of South Alabama)
10/22/11, 9:18 AM
Contributed (undergraduate)
We present a precision measurement of the exclusive anti-B0 meson decays to D*+, lepton, and anti-neutrino using 476 million B-meson anti-B-meson pairs. The data sample collected with the BABAR detector at the PEP-II asymmetric-energy B-Factory at SLAC National Accelerator Laboratory. The anti-B0 mesons are reconstructed using a partial reconstruction in which the D* four-momentum is inferred...
Romulus Godang
(University of South Alabama)
10/22/11, 9:30 AM
Contributed
We report on the study of the decay B+ to D0(D0bar) K+ where the D0 or D0bar meson decaying to Kpipi and Kpipi0, with the Atwood Dunietz and Soni (ADS) and Gronau, London, and Wyler (GLW) methods. We measure the ratios Rads, R+, and R- since the processes B+ to D0barK+ and B+ to D0K+ are proportional to Vcb and Vub, respectively, are sensitive to rB and to the weak phase angle gamma.
Rafi Qumsieh
(University of South Alabama)
10/22/11, 9:42 AM
Contributed
We measure a model independent measurement of the branching fraction of Upsilon(4S) to neutral B pairs. We use a sample of 476 million B-meson anti-B-meson pairs collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B-Factory at SLAC National Accelerator Laboratory. The B mesons are reconstructed through the channel of anti-B0 decays to D*+ lepton...
Vanessa Gaultney
(Florida International University)
10/22/11, 9:54 AM
Contributed
The angular distribution of prompt photons in events with at least one jet in the center-of-mass frame for pp collisions at sqrt{s} = 7 TeV is presented. A template method is used to distinguish between signal and the dominant background from jets fragmenting into neutral mesons. Measuring the angular distribution is a direct probe of the partonic cross section for prompt photon production and...
