Polarized J = ψ production in semi-inclusive DIS at large Q 2: Comparing quark fragmentation and photon-gluon fusion

被引：5

作者：

Copeland, Marston ^{[1
]}

Fleming, Sean ^{[2
]}

Gupta, Rohit ^{[2
]}

Hodges, Reed ^{[1
]}

Mehen, Thomas ^{[1
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

[2] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 07期

基金：

美国国家科学基金会;

关键词：

CHARMONIUM PRODUCTION; J/PSI-PRODUCTION; PAIR PRODUCTION; SCATTERING; NRQCD; TMDS;

D O I：

10.1103/PhysRevD.109.074032

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compare the relative importance of different mechanisms for polarized J= iy production in semiinclusive deep inelastic scattering processes at large Q 2 . The transverse momentum dependent (TMD) factorization framework and nonrelativistic quantum chromodynamics are used to study the leading contributions from light quark fragmentation to polarized J= iy , and compared to direct production via photon -gluon fusion, which can proceed through color -singlet as well as color -octet mechanisms. We identify kinematic regimes where light quark fragmentation dominates, allowing for the extraction of the 3 S 8 1 matrix element, as well as regimes where photon gluon fusion dominates, suggesting that the gluon TMD parton distribution function can be probed.

引用

页数：12

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