Matching generalized parton quasidistributions in the RI/MOM scheme
Citations Over TimeTop 1% of 2019 papers
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 $\overline{\mathrm{MS}}$ 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.
Related Papers
- → Parton Model Without Wee Partons(1973)
- Susquehanna Chorale Spring Concert "Roots and Wings"(2017)
- → Parton interpretation and twist-4 parton distributions(2021)
- → Double parton distributions out of bounds in colour space(2021)