期刊
出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2005.11.251
关键词
particle identification; TOF; TPC; dE/dx; STAR
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 root S-NN = 200 GeV and Au + Au collisions at root S-NN = 62.4 GeV are used to develop the methods. The transverse momentum ()T) ranges of pi, and p(p) identification are from similar to 0.3GeV/c to similar to 10GeV/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. (c) 2006 Elsevier B.V. All rights reserved.
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