arXiv subjects

Keunsu Choi

Publications and source records attributed to Keunsu Choi.

2 recordsLinked to original sources

arXiv2004

$Re(A_0)$, $Re(A_2)$ and RG evolution for $N_f=3$

We present results of $Re (A_0)$ and $Re (A_2)$ calculated using HYP staggered fermions on the lattice of $16^3 \times 64$ at $β=6.0$. These results are obtained using leading order chiral perturbation in quenched QCD. Buras's original RG evolution matrix develops a removable singularity for $N_f=3$. This subtlety is resolved by finding a finite solution to RG equation and the results are presented.

hep-lat↗

arXiv2003

Penguin diagrams for the HYP staggered fermions

We present results of the one-loop corrections originating from the penguin diagrams for the improved staggered fermion operators constructed using various fat links such as Fat7, Fat7+Lepage, $\bar{\rm Fat7}$, HYP (I) and HYP (II). The main results include the diagonal/off-diagonal mixing coefficients and the matching formula between the continuum and lattice operators.

hep-lat↗