%0 Journal Article %T Penguin diagrams for the HYP staggered fermions %A Keunsu Choi %A Weonjong Lee %J Physics %D 2003 %I arXiv %R 10.1016/S0920-5632(03)02607-0 %X 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. %U http://arxiv.org/abs/hep-lat/0309070v2