Speaker
Santanu Mondal
(Michigan State University)
Description
We present preliminary lattice QCD calculations of the unpolarized and polarized distributions of the strange quark using the LaMET method. We use three $N_f=2+1+1$ HISQ ensembles generated by MILC collaboration at lattice spacings $a \approx 0.09, 0.12 {~\rm and~} 0.15$ fm, and clover valence fermions with two valence pion masses: 310 and 690 MeV. We use momentum-smeared sources to improve the signal up to nucleon boost momentum $P_z=2.15$ GeV, and determine nonperturbative renormalization factors in RI/MOM scheme. We compare our results with the matrix elements obtained from matching the PDFs from CT18NNLO and NNPDF3.1NNLO global fits.
Authors
Santanu Mondal
(Michigan State University)
Huey-Wen Lin
(Michigan State University)
Boram Yoon
(Los Alamos National Laboratory)
