Kaon Weak Matrix Elements with Wilson Fermions
高能物理 - 格点
2010-03-19 v1
摘要
We present results of several numerical studies with Wilson fermions relevant for kaon physics. We compute the B_K parameter by using two different methods and extrapolate to the continuum limit. Our preliminary result is B_K(2 GeV)=0.66(7). Delta I=3/2 K->pi pi matrix elements are obtained by using the next-to-leading order expressions derived in chiral perturbation theory in which the low energy constants are determined by the lattice results computed at unphysical kinematics. From the simulation at beta=6.0 our (preliminary) results read: <pi pi|O_7(2 GeV)|K>_{I=2}=0.14(1)(1) GeV^3 and <pi pi|O_8(2GeV)|K>_{I=2}=0.69(6)(6) GeV^3.
引用
@article{arxiv.hep-lat/0209136,
title = {Kaon Weak Matrix Elements with Wilson Fermions},
author = {D. Becirevic and Ph. Boucaud and V. Gimenez and C. -J. D. Lin and V. Lubicz and G. Martinelli and M. Papinutto and C. T. Sachrajda},
journal= {arXiv preprint arXiv:hep-lat/0209136},
year = {2010}
}
备注
3 pages (5 eps figures), Lattice2002(matrixel)