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arXiv 1207.7183hep-exnucl-ex
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$\sqrt{s}=$ 900 GeV在LHC上质子-质子碰撞的零度光子能谱测量

Measurement of zero degree inclusive photon energy spectra for $\sqrt{s}=$ 900 GeV proton-proton collisions at LHC

O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, K. Fukatsu, M. Haguenauer, T. Iso, Y. Itow, K. Kasahara, K. Kawade, T. Mase, K. Masuda, H. Men… 展开作者

O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, K. Fukatsu, M. Haguenauer, T. Iso, Y. Itow, K. Kasahara, K. Kawade, T. Mase, K. Masuda, H. Menjo, G. Mitsuka, Y. Muraki, K. Noda, P. Papini, A. -L. Perrot, S. Ricciarini, T. Sako, K. Suzuki, T. Suzuki, K. Taki, T. Tamura, S. Torii, A. Tricomi, W. C. Turner

摘要:

本文报道了在大型强子对撞机正向实验(LHCf)上测量的$\sqrt{s}=$ 900 GeV质子-质子碰撞正向区的包含光子能谱。对2010年5月在$η> 10.15$和$8.77 < η< 9.46$两个赝快度区收集的0.30 $\mathrm{nb^{-1}}$数据进行分析,并将分析结果与强子相互作用模型DPMJET 3.04、EPOS 1.99、PYTHIA 8.145、QGSJET I -.1em I-03和SIBYLL 2.1的预测结果进行比较,这些模型在超高能宇宙线实验中得到了广泛的应用. EPOS 1.99和SYBILL 2.1显示出与实验数据的光谱形状的合理一致性,而它们预测的横截面比数据低。其他模型,DPMJET 3.04,QGSJET I -.1em I-03和PYTHIA 8.145,与300 GeV以下的数据吻合良好,但预测比300 GeV以上的数据更硬的能谱。这些比较的结果表现出的功能类似于以前报道的数据$\sqrt{s}=$ 7 TeV的碰撞。

英文摘要:

The inclusive photon energy spectra measured by the Large Hadron Collider forward (LHCf) experiment in the very forward region of LHC proton-proton collisions at $\sqrt{s}=$ 900 GeV are reported. The results from the analysis of 0.30 $\mathrm{nb^{-1}}$ of data collected in May 2010 in the two pseudorapidity regions of $η> 10.15$ and $8.77 < η< 9.46$ are compared with the predictions of the hadronic interaction models DPMJET 3.04, EPOS 1.99, PYTHIA 8.145, QGSJET I -.1em I-03 and SIBYLL 2.1, which are widely used in ultra-high-energy cosmic-ray experiments. EPOS 1.99 and SYBILL 2.1 show a reasonable agreement with the spectral shape of the experimental data, whereas they predict lower cross-sections than the data. The other models, DPMJET 3.04, QGSJET I -.1em I-03 and PYTHIA 8.145, are in good agreement with the data below 300 GeV but predict harder energy spectra than the data above 300 GeV. The results of these comparisons exhibited features similar to those for the previously reported data for $\sqrt{s}=$ 7 TeV 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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