  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.
