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

Session

Presentations

13 Aug 2024, 10:45

University of Maryland, College Park

6. Exploring the heavy meson distribution amplitudes from lattice QCD

Qi-An Zhang

13/08/2024, 10:45

We present a method to compute lightcone distribution amplitudes (LCDAs) of heavy meson within heavy quark effective theory (HQET). Our method utilizes quasi distribution amplitudes (quasi-DAs) with a large momentum component $P^z$. We point out that by sequentially integrating out $P^z$ and $m_H$, one can disentangle different dynamical scales. Integrating out $P^z$ allows to connect...

30. Obtaining the TMD Soft function and CS kernel from lattice QCD

Wayne Morris (National Yang Ming Chiao Tung University)

13/08/2024, 11:15

The TMD soft function may be obtained by formulating the Wilson line in terms of auxiliary 1-dimensional fermion fields on the lattice. We take inspiration from heavy quark effective theory (HQET) in order to define the auxiliary field. Our computation takes place in the region of the lattice that corresponds to the “spacelike” region in Minkowski space in order to obtain the Collins soft...

26. The time-ordering issue of TMD soft factors

Yizhuang Liu (Jagiellonian University)

13/08/2024, 11:40

In this talk I revisit the time-ordering issue of TMD soft factors based on coordinate-space analyticity properties of Wightman functions in Wightman-Osterwalder-Schrader QFTs.

In particular, I show that the TMD soft factor for the DY process in three rapidity regularization schemes can be smoothly connected to each other in a way that maintain certain crucial (S=S_t type) equalities...