arXiv:0906.1847·v2·High Energy Physics — Lattice
Physical matrix elements for Delta I = 3/2 channel K to pi pi decays
Matthew Lightman (for the RBC and UKQCD collaborations)
Abstract
K to pi pi matrix elements of the electroweak operator Q_(27,1)^Delta I=3/2 are calculated on the RBC/UKQCD 32^3 x 64, L_s=16 lattices, using 2+1 dynamical flavors and domain wall fermions, with an inverse lattice spacing of a^(-1)=2.42(4) GeV. Data is interpolated or extrapolated to energy conserving kinematics and a preliminary calculation of the experimental parameter |A_2| is performed.
Comments: 7 pages, 3 figures, 2 tables, Talk presented at the XXVI International Symposium on Lattice Field Theory, July 14-19 2008, Williamsburg, Virginia, USA