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arXiv 1403.2641hep-phhep-ex
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强子对撞机上的三光子产生

Triphoton production at hadron colliders

John M. Campbell, Ciaran Williams

摘要:

我们提出了下一个领先的顺序预测在大型强子对撞机和Tevatron的三光子末态的生产。我们的研究结果首次包括光子碎裂的影响,并且我们能够量化不同隔离处方的影响。我们发现,计算占碎裂效应在领先的顺序,和那些采用一个光滑的锥形隔离,没有破碎的贡献是必需的,是在合理的协议彼此。然而,更大的差异时出现的预测率更高阶校正的碎裂功能。此外,我们提出了完整的分析结果的$γγγ$和$γγ+$喷流单圈振幅。这些振幅,这是特别紧凑,可能是有用的,未来的高阶计算。我们的结果是在蒙特卡罗程序MCFM。

英文摘要:

We present next-to-leading order predictions for the production of triphoton final states at the LHC and the Tevatron. Our results include the effect of photon fragmentation for the first time and we are able to quantify the impact of different isolation prescriptions. We find that calculations accounting for fragmentation effects at leading order, and those employing a smooth cone isolation where no fragmentation contribution is required, are in reasonable agreement with one another. However, larger differences in the predicted rates arise when higher order corrections to the fragmentation functions are included. In addition we present full analytic results for the $γγγ$ and $γγ+$jet one-loop amplitudes. These amplitudes, which are particularly compact, may be useful to future higher-order calculations. Our results are available in the Monte Carlo code MCFM.

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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