QCD factorization for quarkonium production in hadron collisions at low transverse momentum

doi:http://dx.doi.org/10.1103/PhysRevD.93.014025

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	QCD factorization for quarkonium production in hadron collisions at low transverse momentum
	Ma, JP; Wang, C
刊名	PHYSICAL REVIEW D
	2016
卷号	93 期号:1 页码:14025
关键词	FINAL-STATE INTERACTIONS PARTON DISTRIBUTIONS HARD PROCESSES GAUGE UNIVERSALITY RESUMMATION SPIN
DOI	http://dx.doi.org/10.1103/PhysRevD.93.014025
英文摘要	Inclusive production of a quarkonium eta(c,b) in hadron collisions at low transverse momentum can be used to extract various transverse-momentum-dependent (TMD) gluon distributions of hadrons, provided the TMD factorization for the process holds. The factorization involving unpolarized TMD gluon distributions of unpolarized hadrons has been examined with on-shell gluons at the one-loop level. In this work, we study the factorization at the one-loop level with a diagram approach in the most general case, where all TMD gluon distributions at leading twist are involved. We find that the factorization holds and the perturbative effects are represented by one perturbative coefficient. Since the initial gluons from hadrons are off shell, in general, there exists the so-called superleading region found recently. We find that the contributions from this region can come from individual diagrams at the one-loop level, but they are canceled in the sum. Our factorized result for the differential cross section is explicitly gauge invariant.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
资助机构	National Nature Science Foundation of China [11275244] ; CAS center for excellence in particle physics (CCEPP)
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23276]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Wang, C.] Peking Univ, Sch Phys, Beijing 100871, Peoples R China 2.[Ma, J. P.] Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China 3.[Ma, J. P.] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Ma, JP,Wang, C. QCD factorization for quarkonium production in hadron collisions at low transverse momentum[J]. PHYSICAL REVIEW D,2016,93(1):14025.
APA	Ma, JP,&Wang, C.(2016).QCD factorization for quarkonium production in hadron collisions at low transverse momentum.PHYSICAL REVIEW D,93(1),14025.
MLA	Ma, JP,et al."QCD factorization for quarkonium production in hadron collisions at low transverse momentum".PHYSICAL REVIEW D 93.1(2016):14025.