  We derive a new method to improve the statistics of identified particles at
high transverse momentum (\pt) using online-triggered events by the Barrel
Electro-Magnetic-Calorimeter (BEMC) detector. The BEMC is used to select
hadronic interaction and energy deposit from showers created by charged hadrons
($\pi^{\pm},K^{\pm}$ and $p$($\bar{p}$)) in the BEMC. With this trigger, the
statistics of the high \pt particles are significantly enhanced by about a
factor of 100 with selection efficiency up to 20%. In addition, resonant states
($\rho^0$, $K^{\star}$) and weak-decay V0 (\Ks and \La(\aLa)) can be
constructed by selecting the BEMC-trigger hadron as one of its daughters. We
also show that the trigger efficiency can be obtained reliably in simulation
and data-driven approaches.
