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题名: QCD factorization for quarkonium production in hadron collisions at low transverse momentum
作者: Ma, JP ;  Wang, C
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 93, 期号:1, 页码:14025
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.93.014025
通讯作者: Ma, JP (reprint author), Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China. ;  Ma, JP (reprint author), Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China.
文章类型: Article
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.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: FINAL-STATE INTERACTIONS ;  PARTON DISTRIBUTIONS ;  HARD PROCESSES ;  GAUGE ;  UNIVERSALITY ;  RESUMMATION ;  SPIN
收录类别: SCI
项目资助者: National Nature Science Foundation of China [11275244] ;  CAS center for excellence in particle physics (CCEPP)
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21795
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Ma, JP,Wang, C. QCD factorization for quarkonium production in hadron collisions at low transverse momentum[J]. PHYSICAL REVIEW D,2016,93(1):14025.
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