Heavy Quarkonium Production and Polarization

被引：81

作者：

Kang, Zhong-Bo ^{[1
]}

Qiu, Jian-Wei ^{[2
,3
]}

Sterman, George ^{[3
]}

机构：

[1] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA

[2] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[3] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 10期

基金：

美国国家科学基金会;

关键词：

QCD; FACTORIZATION; ANNIHILATION;

D O I：

10.1103/PhysRevLett.108.102002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a perturbative QCD factorization formalism for the production of heavy quarkonia of large transverse momentum p(T) at collider energies, which includes both the leading-power (LP) and next-to-leading-power (NLP) contributions to the cross section in the m(Q)(2)/p(T)(2) expansion for heavy quark mass m(Q). We estimate fragmentation functions in the nonrelativistic QCD formalism and reproduce the bulk of the large enhancement found in explicit next-to-leading-order calculations in the color-singlet model. Heavy quarkonia produced from NLP channels prefer longitudinal polarization.

引用

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