Early LHC measurements to check predictions for central exclusive production
Early LHC measurements to check predictions for central exclusive production
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DOI：
10.1140/epjc/s10052-008-0611-9
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发表时间：
2008-02
期刊：
影响因子：
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通讯作者：
V. Khoze;V. Khoze;Alan D. Martin;M. Ryskin;M. Ryskin
中科院分区：
文献类型：
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作者：
V. Khoze;V. Khoze;Alan D. Martin;M. Ryskin;M. Ryskin
我们展示了如何早期的数据运行的大型强子对撞机可以提供有价值的检查的不同组成部分的形式主义，用于预测中央排他过程的横截面。“软”快度间隙生存因子可以在电弱过程中进行研究，例如W+间隙事件，其中裸振幅是众所周知的。广义胶子分布，在适当的运动学区域，可以探测到的独家生产。微扰QCD效应，特别是类Sudakov因子，可以通过排他性的双喷流和三喷流产生来探测。我们讨论了增强吸收校正的可能作用，这将违反通常的形式主义中隐含的软-硬因子分解，我们提出了LHC可能探索其存在的方法。
We show how the early data runs of the LHC can provide valuable checks of the different components of the formalism used to predict the cross sections of central exclusive processes. The ‘soft’ rapidity gap survival factor can be studied in electroweak processes, such as W+gaps events, for which the bare amplitude is well known. The generalised gluon distribution, in the appropriate kinematic region, can be probed by exclusive Υ production. The perturbative QCD effects, especially the Sudakov-like factor, can be probed by exclusive two- and three-jet production. We discuss the possible role of enhanced absorptive corrections that would violate the soft–hard factorisation implied in the usual formalism, and we suggest ways that the LHC may explore their presence.