Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-10-17
PoSLAT2007:359,2007
Physics
High Energy Physics
High Energy Physics - Lattice
14 pages, 10 figures, joint proceedings for talks presented at the XXV International Symposium on Lattice Field Theory, July 3
Scientific paper
$K \to \pi$ and $K \to 0$ weak matrix elements of $\Delta S = 1$ operators have been measured in 2+1 flavor domain wall fermion (DWF) QCD on (3 fm)$^3$ lattices with $a^{-1} = 1.73(3)$ GeV. As is well known, using these matrix elements and chiral perturbation theory allows a determination of the $K \to \pi \pi$ matrix elements that enter in the quantitative value for the $\Delta I = 1/2$ rule and $\epsilon^\prime/\epsilon$. Two light dynamical sea quark masses have been used, along with six valence quark masses, with the lightest valence quark mass $\approx 1/10$ the physical strange quark mass. We report our results for lattice matrix elements in the $SU(3)_L \times SU(3)_R$ (27,1), (8,1), and (8,8) representations, paying particular attention to the statistical errors achieved after measurements on 75 configurations. We also report on our calculation of the non-perturbative renormalization coefficients for these $\Delta S=1$ weak operators, using the Rome-Southampton method.
for RBC Robert D. Mawhinney
Li Shu
UKQCD Collaborations
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