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arXiv 1606.09512hep-ph
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从深度非弹性结构函数到质子-质子碰撞中双光子双轻子的产生

From deep-inelastic structure functions to two-photon dilepton production in proton-proton collisions

Antoni Szczurek, Marta Luszczak, Wolfgang Schaefer

摘要:

我们比较了两种不同的方法用于计算双光子$p p \to l^+ l^- X$过程的截面。在一种方法中,光子被视为质子中的共线部分子。在第二种方法中,最近提出的$k_T$因子分解方法。在这份报告中,我们讨论的灵敏度的结果选择的结构功能参数化和实验削减的$k_T$ -因子分解方法。我们比较了我们的计算结果与最近的实验数据的双轻子生产,发现在大多数情况下,光子-光子机制的贡献是相当小的。我们讨论了如何提高光子-光子贡献。我们还比较了我们的结果,最近的测量独家和半独家$e^+ e^-$对生产与某些实验数据的CMS合作。

英文摘要:

We compare two different approaches used for calculating cross sections for the two-photon $p p \to l^+ l^- X$ process. In one of the approaches photon is treated as a collinear parton in the proton. In the second approach a recently proposed $k_T$-factorization method is used. In this presentation we discuss sensitivity of the results to the choice of structure function parametrization and experimental cuts in the $k_T$-factorization approach. We compare results of our calculations with recent experimental data for dilepton production and find that in most cases the contribution of the photon-photon mechanism is rather small. We discuss how to enhance the photon-photon contribution. We also compare our results to those of recent measurements of exclusive and semi-exclusive $e^+ e^-$ pair production with certain experimental data by the CMS collaboration.

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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