Liu, Yu-Sheng and Wang, Wei and Xu, Ji and Zhang, Qi-An and Zhang, Jian-Hui and Zhao, Shuai and Zhao, Yong (2019) Matching generalized parton quasidistributions in the RI/MOM scheme. PHYSICAL REVIEW D, 100 (3): 034006. ISSN 2470-0010, 2470-0029
Full text not available from this repository. (Request a copy)Abstract
Within the framework of large momentum effective theory (LaMET), generalized parton distributions (GPDs) can be extracted from lattice calculations of quasi-GPDs through a perturbative matching relation, up to power corrections that are suppressed by the hadron momentum. In this paper, we focus on isovector quark GPDs, including the unpolarized, longitudinally, and transversely polarized cases, and present the one-loop matching that connects the quasi-GPDs renormalized in a regularization-independent momentum subtraction scheme to the GPDs in (MS) over bar scheme. We find that the matching coefficient is independent of the momentum transfer squared. As a consequence, the matching for the quasi-GPD with zero skewness is the same as that for the quasi-parton-distribution-function. Our results provide a crucial input for the determination of quark GPDs from lattice QCD using LaMET.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIRTUAL COMPTON-SCATTERING; NONPERTURBATIVE RENORMALIZATION; DISTRIBUTIONS; EVOLUTION; HELICITY; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Apr 2020 05:00 |
| Last Modified: | 01 Apr 2020 05:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26442 |
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