2024 Meeting on Lattice Parton Physics from Large Momentum Effective Theory (LaMET2024)

Session

Presentations

13 Aug 2024, 08:30

University of Maryland, College Park

11. Progress in Lattice calculations for the Boer-Mulders function of the pion

Lisa Walter

13/08/2024, 08:30

We focus on the Boer-Mulders function of the pion and use the CLS ensembles X650 (a = 0.098 fm), H102 (a = 0.085 fm) and N203 (a = 0.064 fm) to study this quantity and later allow for a controlled continuum extrapolation. The pion masses of these ensembles are approximately equal, as they range between 338 and 354 MeV. Here, preliminary results of the ongoing work are shown, including...

18. Collins-Soper kernel from lattice QCD

Artur Avkhadiev

13/08/2024, 08:55

This work presents a determination of the quark Collins-Soper kernel from quasi-TMD wavefunctions using lattice QCD and LaMET. This is the first such determination with systematic control of quark mass, operator mixing, and discretization artifacts. Furthermore, this work also achieves systematic control over the imaginary part of the LaMET matching coefficients at small transverse momentum...

12. Transverse Momentum Distributions from Lattice QCD without Wilson Lines

Yong Zhao

13/08/2024, 09:20

The transverse-momentum-dependent distributions (TMDs), which are defined by gauge-invariant 3D parton correlators with staple-shaped lightlike Wilson lines, can be calculated from quark and gluon correlators fixed in the Coulomb gauge on a Euclidean lattice. These quantities can be expressed gauge-invariantly as the correlators of Coulomb-gauge-dressed fields, which reduce to the standard TMD...

13. Non-perturbative Collins-Soper kernel from a Coulomb-gauge-fixed quasi-TMD

Xiang Gao (Argonne National Lab)

13/08/2024, 09:50

We present the first lattice QCD calculation of the rapidity anomalous dimension of transverse-momentum-dependent distributions (TMDs), i.e. the Collins-Soper (CS) kernel, employing the recently proposed Coulomb-gauge-fixed quasi-TMD formalism as well as a chiral-symmetry-preserving lattice discretization. This unitary lattice calculation is conducted using the domain wall fermion...