Speaker
Dr
Yong-Chull Jang
(Brookhaven National Laboratory)
Description
We update the nucleon axial, electric, and magnetic form factors obtained from Clover-on-HISQ lattice formulation. Previous results from the $2+1+1$-flavor HISQ ensembles are extended by analyzing more ensembles to cover $a \approx 0.15, 0.12, 0.09, 0.06\,\mathrm{fm}$, $M_\pi \approx 310, 220, 130\,\mathrm{MeV}$, and $ 3.3 < M_\pi L < 5.5$. All data are bias corrected with the AMA method. With higher statistics, we control excited-states contamination by including four states in two-point correlator fits and three states in three-point correlator fits. The axial and electromagnetic charge radii and the magnetic moment after chiral-continuum-finite volume extrapolation are compared with phenomenological data.
Primary author
Dr
Yong-Chull Jang
(Brookhaven National Laboratory)
Co-authors
Dr
Boram Yoon
(Los Alamos National Laboratory)
Prof.
Huey-Wen Lin
(MSU)
Dr
Rajan Gupta
(Los Alamos National Lab)
Dr
Tanmoy Bhattacharya
(Los Alamos National Laboratory)