在 sqrt[s(NN)] = 5.02 TeV 的 p+Pb 碰撞中带电粒子的横动量分布和核修正因子。
Transverse momentum distribution and nuclear modification factor of charged particles in p+Pb collisions at sqrt[s(NN)] = 5.02 TeV.
机构信息
Lawrence Livermore National Laboratory, Livermore, California, USA.
出版信息
Phys Rev Lett. 2013 Feb 22;110(8):082302. doi: 10.1103/PhysRevLett.110.082302. Epub 2013 Feb 21.
The transverse momentum (p(T)) distribution of primary charged particles is measured in minimum bias (non-single-diffractive) p+Pb collisions at sqrt[s(NN)]=5.02 TeV with the ALICE detector at the LHC. The p(T) spectra measured near central rapidity in the range 0.5<p(T) <20 GeV/c exhibit a weak pseudorapidity dependence. The nuclear modification factor R(pPb) is consistent with unity for p(T) above 2 GeV/c. This measurement indicates that the strong suppression of hadron production at high p(T) observed in Pb+Pb collisions at the LHC is not due to an initial-state effect. The measurement is compared to theoretical calculations.
在 LHC 上用 ALICE 探测器测量了在 sqrt[s(NN)]=5.02 TeV 下质子-铅非单离相最小偏差（非单分散）碰撞中原始带电粒子的横动量（p(T))分布。在中心快度附近测量的 p(T)谱在 0.5<p(T) <20 GeV/c 的范围内表现出较弱的赝快度依赖性。在 p(T)高于 2 GeV/c 时，核修正因子 R(pPb)与 1 一致。该测量表明，在 LHC 上铅-铅碰撞中观察到的高 p(T)处强子产生的强烈抑制不是由于初始态效应。该测量与理论计算进行了比较。
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