1+1+1 flavor QCD + QED simulation at the physical point
S. Aoki, K.-I. Ishikawa, N. Ishizuka, K. Kanaya, Y. Kuramashi, Y. Nakamura, Y. Namekawa, M. Okawa, Y. Taniguchi, A. Ukawa, N. Ukita, T. Yoshie
Abstract
We present the results of 1+1+1 flavor QCD+QED simulation at the physical point, in which the dynamical quark effects in QED and the up-down quark mass difference are incorporated by the reweighting technique. The physical quark masses together with the lattice spacing are determined with
m
π
+
,
m
K
+
,
m
K
0
and
m
Ω
−
as physical inputs. Calculations are carried out using a set of 2+1 flavor QCD configurations near the physical point generated by the non-perturbatively
O(a)
-improved Wilson quark action and the Iwasaki gauge action at
β=1.9
on a
32
3
×64
lattice. We evaluate the values of the up, down and strange quark masses individually with non-perturbative QCD renormalization.