Chiral perturbation theory, K to pi pi decays and 2+1 flavor domain wall QCD

Abstract

We present a calculation of the low energy constants describing the real and imaginary parts of the $K\to \pi \pi$ decay amplitudes $A_0$ and $A_2$. Leading and next leading order chiral perturbation theory is used and its applicability assessed. A combination of statistical and systematic errors limits the precision of the results. The apparent limitations of chiral perturbation theory raise doubts about the accuracy of a possible extrapolation to physical $K\to \pi \pi$ kinematics.

7 pages, PoS(LATTICE 2008)272

References in corpus (3)

• Physical Results from 2+1 Flavor Domain Wall QCD and SU(2) Chiral Perturbation Theory
• Systematic effects of the quenched approximation on the strong penguin contribution to epsilon'/epsilon
• K to pi and K to 0 in 2+1 Flavor Partially Quenched Chiral Perturbation Theory

Cited by in corpus (5)

• Kaon physics: a lattice perspective
• $K\to \pi \pi$ Decays in SU(2) Chiral Perturbation Theory
• Phenomenology from the Lattice
• G parity boundary conditions and Delta I = 1/2, K to pi pi decays
• Lattice understanding of the Delta I=1/2 rule & some implications