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Extensive Particle Identification with TPC and TOF at the STAR Experiment

M. Shao·O. Barannikova·X. Dong·Y. Fisyak·L. Ruan·P. Sorensen·Z. Xu
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Abstract

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 $π$, 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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M. Shao, O. Barannikova, X. Dong, Y. Fisyak, L. Ruan, P. Sorensen, Z. Xu. 2005-05-28. Extensive Particle Identification with TPC and TOF at the STAR Experiment. https://doi.org/10.1016/j.nima.2005.11.251

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