4.7 Article

Matching generalized parton quasidistributions in the RI/MOM scheme

Journal

PHYSICAL REVIEW D
Volume 100, Issue 3, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.100.034006

Keywords

-

Funding

  1. Science and Technology Commission of Shanghai Municipality [16DZ2260200]
  2. National Natural Science Foundation of China [11655002, 11575110, 11735010, 11621131001, 11521505]
  3. Natural Science Foundation of Shanghai [15DZ2272100, 15ZR1423100]
  4. Shanghai Key Laboratory for Particle Physics and Cosmology
  5. Ministry of Education Key Laboratory for Particle Physics, Astrophysics and Cosmology
  6. grant Hadron Physics from Lattice QCD [Sonderforschungsbereich/Transregio-55]
  7. National Science Foundation of China [11405104]
  8. U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-SC0011090]
  9. Institute for Nuclear Theory at University of Washington [INT-18-3]

Ask authors/readers for more resources

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.

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