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arXiv 1710.09355hep-ex
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$\sqrt{s_{_\mathrm{NN}}} =$ 5.02和8.16 TeV质子-铅碰撞中带电强子的赝快度分布

Pseudorapidity distributions of charged hadrons in proton-lead collisions at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV

CMS Collaboration

摘要:

本文给出了核子-核子质心能量为$\sqrt{s_{_\mathrm{NN}}} =$ 5.02和8.16 TeV的质子-铅碰撞中带电强子的赝快度分布。测量是基于CMS实验在LHC收集的数据样本。在赝快度范围$|η_\mathrm{lab}| <$ 2.4内确定了非单衍射质子-铅碰撞中产生的初级带电强子数。带电强子多重数分布进行了比较,从理论计算和蒙特卡罗事件发生器的预测。在质心赝快度范围$|η_\mathrm{cm}| < 0.5$内,平均带电强子多重数密度$<\mathrm{d}N_{\mathrm{ch}}/\mathrm{d}η_{\mathrm{cm}}>$ $\vert_{|η_{\mathrm{cm}}| < 0.5}$在$\sqrt{s_{_\mathrm{NN}}} =$ 5.02和8.16 TeV处分别为17.31 $\pm$ 0.01(stat)$\pm$ 0.59(syst)和20.10 $\pm$ 0.01(stat)$\pm$ 0.85(syst)。每个参与核子的粒子密度进行比较,在质子-质子,质子-核,和核-核碰撞类似的测量。

英文摘要:

The pseudorapidity distributions of charged hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range $|η_\mathrm{lab}| <$ 2.4. The charged-hadron multiplicity distributions are compared to the predictions from theoretical calculations and Monte Carlo event generators. In the center-of-mass pseudorapidity range $|η_\mathrm{cm}| < 0.5$, the average charged-hadron multiplicity densities $<\mathrm{d}N_{\mathrm{ch}}/\mathrm{d}η_{\mathrm{cm}}>$$\vert_{|η_{\mathrm{cm}}| < 0.5}$ are 17.31 $\pm$ 0.01 (stat) $\pm$ 0.59 (syst) and 20.10 $\pm$ 0.01 (stat) $\pm$ 0.85 (syst) at $\sqrt{s_{_\mathrm{NN}}} =$ 5.02 and 8.16 TeV, respectively. The particle densities per participant nucleon are compared to similar measurements in proton-proton, proton-nucleus, and nucleus-nucleus collisions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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