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arXiv · 1112.2946

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

Hongyu Da·Xiangli Cui·Gene Van Buren·J. C. Dunlop·Xin Dong·Lijuan Ruan·Anthony Timmins·Zebo Tang·Xiaolian Wang·Yichun Xu·Zhangbu Xu
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Abstract

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 ($π^{\pm},K^{\pm}$ 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 ($ρ^0$, $K^{\star}$) 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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Hongyu Da, Xiangli Cui, Gene Van Buren, J. C. Dunlop, Xin Dong, Lijuan Ruan, Anthony Timmins, Zebo Tang, Xiaolian Wang, Yichun Xu, Zhangbu Xu. 2011-12-17. Hadronic Trigger using electromagnetic calorimeter and particle identification at high-pT with STAR Detector. https://arxiv.org/abs/1112.2946

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