A Monte Carlo Study of the Momentum Dependence on the Results of Tracking Unknown Particle Species in the BaBar Detector

Sewerynek, Stephen ; U., /British Columbia

Stanford Linear Accelerator Center

关键词: Universe Experiment-Hep,Hepex;    Forecasting;    B Mesons;    Experiment-Hep,Hepex;    43 Particle Accelerators;   

DOI  :  10.2172/901854
RP-ID  :  SLAC-R-838
RP-ID  :  AC02-76SF00515
RP-ID  :  901854

美国|英语

来源: UNT Digital Library

【 摘 要 】

The BABAR experiment is composed of an international collaboration that will test the Standard Model prediction of CP violation. To accomplish this a new detector was constructed at the asymmetric B Factory, located at the Stanford Linear Accelerator Center. The tests will shed some light on the origins of CP violation, which is an important aspect in explaining the matter/antimatter asymmetry in the universe. In particular, the BABAR experiment will measure CP violation in the neutral B meson system. In order to succeed, the BABAR experiment requires excellent track fitting and particle species identification. Prior to the current study, track fitting was done using only one particle species--the pion. But given the momentum dependence on the accuracy of the results from this choice of particle species, a better algorithm needed to be developed. Monte Carlo simulations were carried out and a new algorithm utilizing all five particle species present in the BABAR detector was created.