Speaker
Mr
Jangho Kim
(Seoul National University)
Description
We present matching factors for the four-fermion operators obtained using the non-perturbative renormalization method (NPR) in RI-MOM scheme for improved staggered fermions on the MILC asqtad lattice (N_f = 2+1).
Using 20^3 * 64 lattice (a = 0.12 fm, am_l/am_s = 0.01/0.05), we obtain the matching factor of B_K operator. Also we are in the middle of data analysis on the BSM operators.
These results will be used to obtain B_K and the BSM B-parameters.
We expect that the matching factor error obtained using NPR is in the level of ~2% which is much smaller than that of the one-loop perturbative matching (~4.4%).
We compare NPR results with those of one-loop perturbative matching.
Primary authors
Mr
Hwancheol Jeong
(Seoul National University)
Mr
Jangho Kim
(Seoul National University)
Mr
Jeonghwan Pak
(Seoul National University)
Dr
Jongjeong Kim
(Seoul National University)
Mr
Sungwoo Park
(Seoul National University)
Prof.
Weonjong Lee
(Seoul National University)
