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arXiv 1608.05906hep-phhep-ex
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双回路QCD对大质量自旋2共振$ \to q ~ \bar{q} ~ g $的修正

Two-loop QCD Correction to Massive Spin-2 Resonance $ \to q ~ \bar{q} ~ g $

Taushif Ahmed, Goutam Das, Prakash Mathews, Narayan Rana, V. Ravindran

摘要:

考虑自旋为2的大质量引力子通过守恒能量动量张量与SM的一般普适耦合,给出了自旋为2的引力子衰变到$q ~ + ~ \bar{q}~ + ~g$的双圈QCD修正.这样一个巨大的自旋为2的粒子可以出现在额外维度的模型中。研究了量子色动力学振幅的紫外和红外结构。在维度正则化中,红外极点结构与Catani的提议一致,证实了QCD振幅的普适因式分解性质,即使是自旋2张量耦合。这样计算就完成了与喷流有关的自旋2产生的全部双圈QCD修正。

英文摘要:

Two-loop QCD correction to massive spin-2 Graviton decaying to $q ~ + ~ \bar{q}~ + ~g$ is presented considering a generic universal spin-2 coupling to the SM through the conserved energy-momentum tensor. Such a massive spin-2 particle can arise in extra-dimensional models. The ultraviolet and infrared structure of the QCD amplitudes are studied. In dimensional regularisation, the infrared pole structure is in agreement with Catani's proposal, confirming the universal factorization property of QCD amplitudes, even with the spin-2 tensorial coupling. This computation now completes the full two-loop QCD corrections for the production of a spin-2 in association with a jet.

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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