The Collins-Soper Kernel from Lattice QCD with Dynamical Fermions

ORAL

Abstract

In this talk, I present a lattice quantum chromodynamics calculation of the nonperturbative Collins-Soper kernel, which describes the energy evolution of quark transverse-momentum-dependent parton distribution functions. The kernel is extracted at transverse momentum scales in the range 400~MeV~$< q_T < 1.7$~GeV in a calculation with dynamical fermions and a larger-than-physical pion mass, with systematic treatment of operator mixings, Fourier transform, perturbative matching and power corrections.

*This work is supported in part by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under grant Contract Number DE-SC0011090, DE-AC02-06CH11357, DE-SC0012704 and within the framework of the TMD Topical Collaboration. PES is additionally supported by U.S. DOE Early Career Award DE-SC0021006, by a NEC research award, and by the Carl G and Shirley Sontheimer Research Fund and by the U.S. National Science Foundation under Cooperative Agreement PHY- 2019786 (The NSF AI Institute for Artificial Intelligence and Fundamental Interactions, http://iaifi.org/). This research used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DE-AC02-05CH11231, and the Extreme Science and Engineering Discovery Environment (XSEDE) Bridges-2 at the Pittsburgh Supercomputing Center (PSC) through allocation TG-PHY200036, which is supported by National Science Foundation gr

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Publication: "The Collins-Soper Kernel from Lattice QCD with Dynamical Fermions", Phiala Shanahan, Michael Wagman and Yong Zhao, in preparation

Presenters

  • Yong Zhao

    • Argonne National Laboratory

Authors

  • Yong Zhao

    • Argonne National Laboratory

  • Phiala E Shanahan

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology

  • Michael L Wagman

    • Fermilab
    • FNAL