Next-to-leading-order QCD corrections to the yields and polarisations of J/psi and Gamma directly produced in association with a Z boson at the LHC

	Next-to-leading-order QCD corrections to the yields and polarisations of J/psi and Gamma directly produced in association with a Z boson at the LHC
	Gong B(龚斌); Gong, B; Lansberg, JP; Lorce, C; Wang, JX; Wang JX(王建雄)
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2013
期号	3 页码:115
关键词	QCD Phenomenology NLO Computations
英文摘要	We update the study of the production of direct J/psi in association with a Z boson at the Next-to-Leading Order (NLO) in alpha(s) by evaluating both the yield differential in P-T and the J/psi polarisation in the QCD-based Colour-Singlet Model (CSM). Contrary to an earlier claim, QCD corrections at small and mid P-T are small if one assumes that the factorisation and the renormalisation scales are commensurate with the Z boson mass. As it can be anticipated, the t-channel gluon-exchange (t-CGE) topologies start to be dominant only for P-T greater than or similar to m(Z)/2. The polarisation pattern is not altered by the QCD corrections. This is thus far the first quarkonium-production process where this is observed in the CSM. Along the same lines, our predictions for direct Gamma + Z are also given.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000317522400027
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224422]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Gong B,Gong, B,Lansberg, JP,et al. Next-to-leading-order QCD corrections to the yields and polarisations of J/psi and Gamma directly produced in association with a Z boson at the LHC[J]. JOURNAL OF HIGH ENERGY PHYSICS,2013(3):115.
APA	龚斌,Gong, B,Lansberg, JP,Lorce, C,Wang, JX,&王建雄.(2013).Next-to-leading-order QCD corrections to the yields and polarisations of J/psi and Gamma directly produced in association with a Z boson at the LHC.JOURNAL OF HIGH ENERGY PHYSICS(3),115.
MLA	龚斌,et al."Next-to-leading-order QCD corrections to the yields and polarisations of J/psi and Gamma directly produced in association with a Z boson at the LHC".JOURNAL OF HIGH ENERGY PHYSICS .3(2013):115.