Breakdown of QCD factorization for P-wave quarkonium production at low transverse momentum

被引：23
作者：
Ma, J. P. [1 ,2 ]
Wang, J. X. [3 ]
Zhao, S. [1 ]
机构：
[1] Acad Sinica, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
[2] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
[3] Acad Sinica, Inst High Energy Phys, Beijing 100049, Peoples R China
来源：
PHYSICS LETTERS B | 2014年 / 737卷
基金：
中国国家自然科学基金;
关键词：
TO-BACK JETS; GAUGE; DECAY; PAIR;
D O I：
10.1016/j.physletb.2014.08.033
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Quarkonium production at low transverse momentum in hadron collisions can be used to extract Transverse-Momentum-Dependent (TMD) gluon distribution functions, if TMD factorization holds there. We show that TMD factorization for the case of P-wave quarkonium with J(PC) = 0(++), 2(++) holds at one-loop level, but is violated beyond one-loop level. TMD factorization for other P-wave quarkonium is also violated already at one-loop level. (C) 2014 The Authors. Published by Elsevier B.V.
引用
收藏
页码：103 / 108
页数：6
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