TMDs: Towards a Synergy between Lattice QCD and Global Analysis

Collins-Soper kernel from lattice QCD at the physical pion mass

22 Jun 2023, 12:00

30m

Center for Frontiers in Nuclear Science, Stony Brook University

Session II

Speaker

Artur Avkhadiev (Massachusetts Institute of Technology)

Description

This work presents a determination of the quark Collins-Soper kernel, which relates transverse-momentum-dependent parton distributions (TMDs) at different rapidity scales, using lattice Quantum Chromodynamics (QCD). This is the first lattice QCD calculation of the kernel at quark masses corresponding to a close-to-physical value of the pion mass, with next-to-next-leading order matching to TMDs from the corresponding lattice-calculable distributions, and includes a complete analysis of systematic uncertainties arising from operator mixing. The kernel is extracted at transverse momentum scales $240\mathrm{M}\mathrm{e}\mathrm{V}<{\mathrm{q}}_{\mathrm{T}}<1.7\mathrm{G}\mathrm{e}\mathrm{V}$ with a precision sufficient to discriminate between different phenomenological models in the non-perturbative region.

Presentation materials

Avkhadiev_CS_noon.pdf