Extensive Particle Identification with TPC and TOF at the STAR Experiment

Details Extensive Particle Identification with TPC and TOF at the STAR Experiment Extensive Particle Identification with TPC and TOF at the STAR Experiment

2005-05-27

arxiv.org/abs/nucl-ex/0505026v2

Nucl.Instrum.Meth.A558:419-429,2006

Physics

Nuclear Physics

Nuclear Experiment

19 pages, 22 figures, 3 tables, submitted to NIM A

Scientific paper

10.1016/j.nima.2005.11.251

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+p, d+Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV and Au+Au collisions at $\sqrt{s_{_{NN}}}=62.4$ GeV are used to develop the methods. The transverse momentum ($p_T$) ranges of $\pi$, and $p(\bar{p})$ identification are from $\sim0.3$ GeV/$c$ to $\sim10$ 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.

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