Photon-pair jet production via gluon fusion at the LHC

	Photon-pair jet production via gluon fusion at the LHC
	Qiang, L; 高向东;Gao, XD
刊名	JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
	2012
卷号	39 期号:8 页码:85005
英文摘要	Photon-pair direct or jet-associated production is important for relevant standard model measurement, Higgs and new physics searches at the Large Hadron Collider (LHC). The loop-induced gluon-fusion process gg -> gamma gamma g, which formally contributes only at the next-to-next-to-leading order to gamma gamma j productions, may get enhanced by the large gluon flux at the LHC. We have checked and confirmed previous results on gg -> gamma gamma (Dicus and Willenbrock 1988 Phys. Rev. D37 1801), gamma gamma g (de Florian andKunszt 1999 Phys. Lett. B 460 184) at one loop, using the traditional Feynman diagram based approach, taking into account the quark mass effects, and updated them further for the 7 and 14 TeV LHC with new inputs and settings. We provide the details and results of the calculations, which involve manipulation of rank-5 pentagon integrals. Our results show that the gluon-fusion process can contribute about 10% of the Born result, especially at small M-gamma gamma and P-gamma gamma(T), and increase further the overall scale uncertainty. Top quark loop effects are examined in detail, which become important near or above the threshold M-gamma gamma greater than or similar to 2m(t).
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000306800700007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224599]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Qiang, L,高向东；Gao, XD. Photon-pair jet production via gluon fusion at the LHC[J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2012,39(8):85005.
APA	Qiang, L,&高向东；Gao, XD.(2012).Photon-pair jet production via gluon fusion at the LHC.JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,39(8),85005.
MLA	Qiang, L,et al."Photon-pair jet production via gluon fusion at the LHC".JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 39.8(2012):85005.