Calculating ${\epsilon }^{\prime }/\epsilon$ using HYP staggered fermions

Abstract

We present preliminary results for ${\epsilon }^{\prime }/\epsilon$ calculated using HYP staggered fermions in the quenched approximation. We compare different choices of quenched penguin operators.

3 pages, 4 figures, Contribution to Lattice 2004 International Symposium

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• Direct CP violation in $K^0\to \pi \pi$: Standard Model Status
• K^0-\bar K^0 mixing beyond the standard model and CP-violating electroweak penguins in quenched QCD with exact chiral symmetry
• Correlations between epsilon'/epsilon and Rare K Decays in the Littlest Higgs Model with T-Parity
• Systematic effects of the quenched approximation on the strong penguin contribution to epsilon'/epsilon
• Quenched penguins and the Delta I=1/2 rule
• Renormalisation group evolution for the $\Delta S=1$ effective Hamiltonian with $N_f=2+1$
• Distinguishing Between Hierarchical and Lop-sided SO(10) Models