Transverse momentum dependent parton quasidistributions
Transverse momentum dependent parton quasidistributions
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DOI：
10.1103/physrevd.99.114006
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发表时间：
2018-01
影响因子：
5
通讯作者：
X. Ji;Luchang Jin;F. Yuan;Jian-Hui Zhang;Yong Zhao
中科院分区：
文献类型：
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作者：
X. Ji;Luchang Jin;F. Yuan;Jian-Hui Zhang;Yong Zhao
Author（s）：Ji，X; Jin，LC; Yuan，F; Zhang，JH; Zhao，Y|摘要：© 2019作者。由美国物理学会出版。由美国物理学会根据« https：//creativecommons.org/licenses/by/4.0/»知识共享署名4.0国际许可条款发布。本作品的进一步分发必须保留作者和已发表文章的标题、期刊引文和DOI的归属。由SCOAP 3提供资金。在部分子准分布框架下研究了横向动量相关的部分子分布。TMD定义中的类空规范链的收缩极奇异性问题可以通过规范链沿着强子运动方向的有限长度来解决。此外，通过引入软因子，准TMD不存在线性发散。我们进一步证明了准TMD的能量演化方程a.k.a. Collins-Soper演化只依赖于强子动量。这导致准TMD和标准TMD之间的明确匹配。
Author(s): Ji, X; Jin, LC; Yuan, F; Zhang, JH; Zhao, Y | Abstract: © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the «https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We investigate the transverse momentum dependent parton distributions (TMDs) in the parton quasidistributions framework. The longstanding hurdle of the so-called pinch pole singularity from the spacelike gauge links in the TMD definitions can be resolved by the finite length of the gauge link along the hadron moving direction. In addition, with the soft factor subtraction, the quasi-TMD is free of linear divergence. We further demonstrate that the energy evolution equation of the quasi-TMD a.k.a. the Collins-Soper evolution, only depends on the hadron momentum. This leads to a clear matching between the quasi-TMD and the standard TMDs.