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arXiv 1602.01633hep-ex
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在LHC上用ATLAS探测器测量的$\sqrt{s}=13$ TeV $pp$相互作用中的带电粒子分布

Charged-particle distributions in $\sqrt{s}=13$ TeV $pp$ interactions measured with the ATLAS detector at the LHC

ATLAS Collaboration

摘要:

带电粒子分布测量质子-质子碰撞的质心能量为13 TeV,使用近900万事件的数据样本,对应于170 $μ$ b $^{-1}$的积分亮度,由ATLAS探测器记录在一个特殊的大型强子对撞机填充。给出了带电粒子多重数及其对横动量和赝快度的依赖关系,以及平均横动量对带电粒子多重数的依赖关系。的测量进行与带电粒子的横向动量大于500兆电子伏和绝对赝快度小于2.5,在至少有一个带电粒子满足这些运动学要求的事件。另外,在一个减少的相位空间的绝对赝快度小于0.8的测量也被提出,为了与其他实验进行比较。检测器的影响,作为粒子级分布的结果进行了校正,并进行比较,各种蒙特卡罗事件发生器的预测。

英文摘要:

Charged-particle distributions are measured in proton-proton collisions at a centre-of-mass energy of 13 TeV, using a data sample of nearly 9 million events, corresponding to an integrated luminosity of 170 $μ$b$^{-1}$, recorded by the ATLAS detector during a special Large Hadron Collider fill. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the dependence of the mean transverse momentum on the charged-particle multiplicity are presented. The measurements are performed with charged particles with transverse momentum greater than 500 MeV and absolute pseudorapidity less than 2.5, in events with at least one charged particle satisfying these kinematic requirements. Additional measurements in a reduced phase space with absolute pseudorapidity less than 0.8 are also presented, in order to compare with other experiments. The results are corrected for detector effects, presented as particle-level distributions and are compared to the predictions of various Monte Carlo event generators.

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