Next-to-leading-order QCD corrections to e+e− → H + γ

doi:10.1016/j.physletb.2017.10.044

	Next-to-leading-order QCD corrections to e+e− → H + γ
	Sun QF(孙青峰); Sang, W.-L., 陈文; Feng F(冯锋); Jia Y(贾宇); W. Chen, F. Feng, Y. Jia and Q.-F. Sun
刊名	PHYSICS LETTERS B
	2017
卷号	775 页码:152-159
关键词	Standard Model Higgs boson QCD corrections
ISSN号	0370-2693
DOI	10.1016/j.physletb.2017.10.044
文献子类	Article
英文摘要	The associated production of Higgs boson with a hard photon at lepton collider, i.e., e(+)e(-) -> H gamma, is known to bear a rather small cross section in Standard Model, and can serve as a sensitive probe for the potential new physics signals. Similar to the loop-induced Higgs decay channels H -> gamma gamma, Z gamma, the e(+)e(-) -> H gamma process also starts at one-loop order provided that the tiny electron mass is neglected. In this work, we calculate the next-to-leading-order (NLO) QCD corrections to this associated H + gamma production process, which mainly stem from the gluonic dressing to the top quark loop. The QCD corrections are found to be rather modest at lower center-of-mass energy range (root s < 300 GeV), thus of negligible impact on Higgs factory such as CEPC. Nevertheless, when the energy is boosted to the ILC energy range (root s approximate to 400 GeV), QCD corrections may enhance the leading-order cross section by 20%. In any event, the e(+)e(-) -> H gamma process has a maximal production rate sigma(max) approximate to 0.08 fb around root s= 250 GeV, thus CEPC turns out to be the best place to look for this rare Higgs production process. In the high energy limit, the effect of NLO QCD corrections become completely negligible, which can be simply attributed to the different asymptotic scaling behaviors of the LO and NLO cross sections, where the former exhibits a milder decrement alpha 1/s, but the latter undergoes a much faster decrease alpha 1/s(2). (C) 2017 The Author(s). Published by Elsevier B.V.
电子版国际标准刊号	1873-2445
WOS关键词	ELECTROWEAK RADIATIVE-CORRECTIONS ; HIGGS-BOSON ; FEYNMAN DIAGRAMS ; E+E-ANNIHILATION ; STANDARD MODEL ; 2-PHOTON DECAY ; PARTICLES ; COLLIDERS ; PHYSICS ; QUARKS
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000417190700021
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284579]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Sun QF,Sang, W.-L., 陈文,Feng F,et al. Next-to-leading-order QCD corrections to e+e− → H + γ[J]. PHYSICS LETTERS B,2017,775:152-159.
APA	孙青峰,Sang, W.-L., 陈文,冯锋,贾宇,&W. Chen, F. Feng, Y. Jia and Q.-F. Sun.(2017).Next-to-leading-order QCD corrections to e+e− → H + γ.PHYSICS LETTERS B,775,152-159.
MLA	孙青峰,et al."Next-to-leading-order QCD corrections to e+e− → H + γ".PHYSICS LETTERS B 775(2017):152-159.