Identified hadron production at high transverse momenta in p plus p collisions at √sNN=200 GeV in STAR

被引：0
|
作者：
Xu, Yichun [1 ]
机构：
[1] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2009年 / 62卷 / 01期
关键词：
D+AU COLLISIONS; SPECTRA; P+P;
D O I：
10.1140/epjc/s10052-009-0901-x
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We report the transverse momentum (p(T)) distributions for identified charged pions, protons and anti-protons using events triggered by high deposit energy in the Barrel Electro-Magnetic Calorimeter (BEMC) from p + p collisions at root s(NN) = 200 GeV. The spectra are measured around mid-rapidity (vertical bar y vertical bar < 0.5) over the range of 3 < p(T) < 15 GeV/c with particle identification (PID) by the relativistic ionization energy loss (rdE/dx) in the Time Projection Chamber (TPC) of the Solenoidal Tracker at RHIC (STAR). The charged pion, proton and anti-proton spectra at high p(T) are compared with published results from minimum bias triggered events and the Next-Leading-Order perturbative quantum chromodynamic (NLO pQCD) calculations (DSS, KKP and AKK 2008). In addition, we present the particle ratios of pi(-)/pi(+), <(p)over bar>/p, p/pi(+) and (p) over bar/pi(-) in p+ p collisions.
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收藏
页码：187 / 190
页数：4
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