Extensive Particle Identification with TPC and TOF at the STAR Experiment

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 $\pi$, and $p(\bar{p})$ identification are from $\sim 0.3$ GeV/$c$ to $\sim 10$ 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.

arXiv comment19 pages, 22 figures, 3 tables, submitted to NIM A

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• The STAR Time Projection Chamber: A Unique Tool for Studying High Multiplicity Events at RHIC
• Open charm yields in d+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at $\sqrt{s_{NN}}=200$ GeV
• The TOFp/pVPD Time of Flight System for STAR
• A Readout System for the STAR Time Projection Chamber
• Photon and neutral pion production in Au+Au collisions at sqrt(s_{NN}) = 130 GeV
• Pion, Kaon, and (Anti-) Proton Production in Au+Au Collisions at \srt = 62.4 GeV
• $\pi ,K,p$ and $\bar{p}$ production from Au+Au collisions at $\sqrt{s_{{}_{NN}}}=62.4$ GeV
• Charged Pion Spectra in Au+Au Collisions at \srt=62.4 GeV

Cited by in corpus (60)

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