Extensive particle identification with TPC and TOF at the STAR experiment

✍ Scribed by Ming Shao; Olga Barannikova; Xin Dong; Yuri Fisyak; Lijuan Ruan; Paul Sorensen; Zhangbu Xu

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 575 KB
• Volume: 558
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2005.11.251

✦ Synopsis

Particle identification (PID) capabilities are studied by using the Time Projection Chamber (TPC) and a Time-Of-Flight (TOF) detector together at STAR. The identification capability of charged hadrons is greatly extended compared with that achieved by TPC and TOF separately. Particle spectra from p þ p, d þ Au collisions at ffiffiffiffiffiffiffiffi s NN p ¼ 200 GeV and Au þ Au collisions at ffiffiffiffiffiffiffiffi s NN p ¼ 62:4 GeV are used to develop the methods. The transverse momentum (p T ) ranges of p, and pð pÞ identification are from $0:3 GeV=c to $10 GeV=c. The high p T reach is limited by statistics in current data sets. An important conceptual advance was developed to identify electrons by using a combination of dE=dx in TPC and velocity information from the TOF detectors, which is important for future low-mass dilepton program at STAR.