Penguin diagrams for the HYP staggered fermions
Keunsu Choi, Weonjong Lee
TL;DR
This paper calculates one-loop penguin diagram corrections for improved staggered fermion operators with various fat links, providing essential mixing coefficients and matching formulas for lattice-continuum operator correspondence.
Contribution
It offers the first comprehensive calculation of penguin diagram corrections for multiple improved staggered fermion operators with different fat links.
Findings
Diagonal and off-diagonal mixing coefficients determined.
Matching formulas between continuum and lattice operators derived.
Results facilitate more accurate lattice QCD computations.
Abstract
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, , 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.
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