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Open Access Publications from the University of California

Quasiparton distribution functions at NNLO: Flavor nondiagonal quark contributions

  • Author(s): Chen, LB
  • Wang, W
  • Zhu, R
  • et al.

© 2020 authors. Published by the American Physical Society. We present a next-to-next-to-leading order (NNLO) calculation of the quasiparton distribution functions (quasi-PDFs) in the large momentum effective theory (LaMET). We focus on the flavor nondiagonal quark-quark channel and demonstrate the LaMET factorization at the NNLO accuracy in the modified minimal subtraction scheme. The matching coefficient between the quasi-PDF and the light-cone PDF is derived. This provides a first step towards a complete NNLO analysis of quasi-PDFs and to better understand the nucleon structures from the first principle of QCD.

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