Speaker
Sungwoo Park
(Lawrence Livermore National Laboratory)
Description
We update our calculation of flavor diagonal nucleon axial, scalar and tensor charges on eight 2+1+1-flavor MILC HISQ ensembles using Wilson-clover fermions. We discuss the signal in the sum of the connected and disconnected contributions for the up, down and strange quarks, control over fits to remove excited state contamination, the simultaneous chiral-continuum fit used to extract the charges. We calculate the renormalization including mixing between flavors nonperturbatively using RI-sMOM. We compare two different determinations of $Z_\psi$, one from the quark propagator and the other from the nucleon vector charge and the vector Ward identity, and consider the resulting difference in the renormalized flavor diagonal charges.
| Topical area | Structure of Hadrons and Nuclei |
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Primary authors
Tanmoy Bhattacharya
(Los Alamos National Laboratory)
Rajan Gupta
(Los Alamos National Lab)
Huey-Wen Lin
(MSU)
Santanu Mondal
(National Chiao-Tung University)
Sungwoo Park
(Lawrence Livermore National Laboratory)
Boram Yoon
(NVIDIA Corporation)