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arXiv 1808.09877hep-ex
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用LHCf Arm2探测器测量$\mathrm{\sqrt{s} = 13~TeV}$质子-质子碰撞的包容前向中子产生截面

Measurement of inclusive forward neutron production cross section in proton-proton collisions at $\mathrm{\sqrt{s} = 13~TeV}$ with the LHCf Arm2 detector

O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D'Alessandro, S. Detti, M. Haguenauer, Y. Itow, K. Kasahara, Y. Makino, K. Masuda, H. Menjo, Y. Muraki, K. Ohashi… 展开作者

O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D'Alessandro, S. Detti, M. Haguenauer, Y. Itow, K. Kasahara, Y. Makino, K. Masuda, H. Menjo, Y. Muraki, K. Ohashi, P. Papini, S. Ricciarini, T. Sako, N. Sakurai, K. Sato, M. Shinoda, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, M. Ueno, Q. D. Zhou

摘要:

本文报道了利用大型强子对撞机LHCf Arm 2探测器在$\mathrm{\sqrt{s} = 13~TeV}$上测量质子-质子碰撞中前向中子的产生。在三个不同的赝快度区:$η> 10.76$,$8.99 < η< 9.22$和$8.81 < η< 8.99$,给出了包含微分产生截面随能量变化的结果.使用2015年6月获得的数据集进行分析,该数据集对应于$\mathrm{0.194~nb^{-1}}$的积分光度。测量结果进行了比较,用于模拟超高能宇宙线产生的空气簇射的几个强子相互作用模型的预测。这些发电机都没有表现出良好的协议与所有的伪快度间隔的数据。对于$η> 10.76$,没有模型能够再现在$\mathrm{5~TeV}$附近观察到的峰结构,并且所有模型都低估了总生产截面:其中,QGSJET II-04显示出相对于整个能量范围的数据的最小赤字。对于$8.99 < η< 9.22$和$8.81 < η< 8.99$,与数据具有最佳总体一致性的模型分别是SIBYLL 2.3和EPOS-LHC:特别是,在这两个区域,SIBYLL 2.3能够再现在$\mathrm{1.5-2.5~TeV}$附近观察到的峰结构。

英文摘要:

In this paper, we report the measurement relative to the production of forward neutrons in proton-proton collisions at $\mathrm{\sqrt{s} = 13~TeV}$ obtained using the LHCf Arm2 detector at the Large Hadron Collider. The results for the inclusive differential production cross section are presented as a function of energy in three different pseudorapidity regions: $η> 10.76$, $8.99 < η< 9.22$ and $8.81 < η< 8.99$. The analysis was performed using a data set acquired in June 2015 that corresponds to an integrated luminosity of $\mathrm{0.194~nb^{-1}}$. The measurements were compared with the predictions of several hadronic interaction models used to simulate air showers generated by Ultra High Energy Cosmic Rays. None of these generators showed good agreement with the data for all pseudorapidity intervals. For $η> 10.76$, no model is able to reproduce the observed peak structure at around $\mathrm{5~TeV}$ and all models underestimate the total production cross section: among them, QGSJET II-04 shows the smallest deficit with respect to data for the whole energy range. For $8.99 < η< 9.22$ and $8.81 < η< 8.99$, the models having the best overall agreement with data are SIBYLL 2.3 and EPOS-LHC, respectively: in particular, in both regions SIBYLL 2.3 is able to reproduce the observed peak structure at around $\mathrm{1.5-2.5~TeV}$.

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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