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arXiv 0705.0036hep-ph
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小$x$非线性胶子演化对超相对论质子-质子碰撞中瞬发光子的增强

Enhancement of prompt photons in ultrarelativistic proton-proton collisions from nonlinear gluon evolution at small-$x$

C. Brenner Mariotto, V. P. Goncalves

摘要:

在本文中,我们估计的非线性胶子演化的影响,在生产的提示光子在LHC pp对撞机。我们假设共线因式分解的有效性,并考虑EHKQS部分子分布,这是GLR-MQ演化方程的解决方案,并很好地描述了DESY $ep$ HERA数据,作为我们的计算输入。我们发现,低$p_T$光子和中枢反应速度的单光子和双光子产生均增强,而高$p_T$光子则不存在这种效应。本文还讨论了这种效应对夸克-胶子等离子体搜索和Higgs的QCD背景的影响。

英文摘要:

In this paper we estimate the influence of nonlinear gluon evolution in the production of prompt photons at the LHC pp collider. We assume the validity of collinear factorization and consider the EHKQS parton distributions, which are solutions of the GLR-MQ evolution equations and describe quite well the DESY $ep$ HERA data, as input in our calculations. We find that both single and double photon production are enhanced for low-$p_T$ photons and central rapidities, while this effect is absent for the high-$p_T$ photons. The implications of this effect for the Quark-Gluon Plasma searches and for the QCD background to Higgs are also discussed.

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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