Conveners
Session II
- There are no conveners in this block
Session II
- There are no conveners in this block
Session II: Discussion
- Yong Zhao (Argonne National Laboratory)
-
Jiunn-Wei Chen (National Taiwan University)12/1/22, 11:10 AM
I will discuss the matching of quasi-PDF and quasi-GPD for the hybrid scheme. The IR renormalon ambiguity of the quasi-PDF in this scheme is also discussed.
Go to contribution page -
Xiang Gao12/1/22, 11:35 AM
Many present lattice QCD approaches to calculate the parton distribution functions (PDFs) rely on a factorization formula or effective theory expansion of certain Euclidean matrix elements in boosted hadron states. In the quasi- and pseudo-PDF methods, the matching coefficient in the factorization or expansion formula includes large logarithms near the threshold, which arise from the subtle...
Go to contribution page -
Yushan Su (University of Maryland)12/1/22, 12:00 PM
In the large-momentum expansion for parton distribution functions (PDFs), the natural physics scale is the longitudinal momentum ($p_z$) of the quarks (or gluons) in a large-momentum hadron. We show how to expose this scale dependence through resumming logarithms of the type $\ln^n p_z/\mu$ in the matching coefficient, where $\mu$ is a fixed renormalization scale. The result enhances the...
Go to contribution page -
Martha Constantinou (Temple University)12/2/22, 11:10 AM
Traditionally, lattice QCD computations of GPDs have been carried out in a frame, where the transferred momentum is symmetrically distributed between the incoming and outgoing hadrons. However, such frames are inconvenient for lattice QCD calculations since each value of the momentum transfer requires a separate calculation, increasing the computational cost. In a recent work...
Go to contribution page -
Joshua Miller (Temple University)12/2/22, 11:35 AM
Historically, GPDs have been defined in the symmetric frame, where the momentum transfer between the initial and final hadron state is equally distributed to the two states.
Go to contribution page
Such a setup is computationally very costly for their frame-dependent counterparts in lattice QCD, such as the quasi-GPDs. In this work we present a calculation of the pion GPD using the methodology proposed recently in...