Hadronic Trigger using electromagnetic calorimeter and particle identification at high-pT with STAR Detector

Details Hadronic Trigger using electromagnetic calorimeter and particle identification at high-pT with STAR Detector Hadronic Trigger using electromagnetic calorimeter and particle identification at high-pT with STAR Detector

2011-12-13

arxiv.org/abs/1112.2946v3

Physics

High Energy Physics

High Energy Physics - Experiment

15pages, 16 figures

Scientific paper

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.

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