Transverse momentum spectra of charged particles in proton-proton collisions at √s=900 GeV with ALICE at the LHC
Transverse momentum spectra of charged particles in proton-proton collisions at √s=900 GeV with ALICE at the LHC
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DOI：
10.1016/j.physletb.2010.08.026
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发表时间：
2010-09-27
影响因子：
4.4
通讯作者：
Zynovyev, M.
中科院分区：
文献类型：
--
作者：
Aamodt, K.;Abel, N.;Zynovyev, M.
用ALICE探测器测量了大型强子对撞机上S=900GeV质子-质子根部碰撞中的带电粒子横向动量分布。在0.15<；p(T)<；10GeV/c的横向动量范围内，在中心伪快度区域(垂直条，垂直条，0.8)进行了测量，并研究了横向动量与粒子多重数之间的关联。给出了非弹性(Inel)和非单衍射(NSD)事件的结果。垂直杆的平均横向动量为<；p(T)>；(Inel)=0.483+/-0.001(统计)+/-0.007(系统)Gev/c和<；p(T)>；(Nsd)=0.489+/-0.001(统计)+/-0.007(系统)Gev/c。在较宽的伪快度区间内，数据显示的<；p(T)>；略大于测量值。结果与蒙特卡罗事件产生器PYTHIA和PHOJET的模拟结果进行了比较。(C)2010年，爱思唯尔出版。
The inclusive charged particle transverse momentum distribution is measured in proton-proton collisions at root s = 900 GeV at the LHC using the ALICE detector. The measurement is performed in the central pseudorapidity region (vertical bar eta vertical bar < 0.8) over the transverse momentum range 0.15 < p(T) < 10 GeV/c. The correlation between transverse momentum and particle multiplicity is also studied. Results are presented for inelastic (INEL) and non-single-diffractive (NSD) events. The average transverse momentum for vertical bar eta vertical bar < 0.8 is < p(T)>(INEL) = 0.483 +/- 0.001 (stat.) +/- 0.007 (syst.) GeV/c and < p(T)>(NSD) = 0.489 +/- 0.001 (stat.) +/- 0.007 (syst.) GeV/c, respectively. The data exhibit a slightly larger < p(T)> than measurements in wider pseudorapidity intervals. The results are compared to simulations with the Monte Carlo event generators PYTHIA and PHOJET. (C) 2010 Published by Elsevier B.V.