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26 April 2024

» arxiv » hep-lat/0110142

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Calculation of $K opipi$ decay amplitudes from $K opi$ matrix elements in quenched domain-wall QCD
CP-PACS Collaboration: S.Aoki ; Y.Aoki ; R.Burkhalter ; S.Ejiri ; M.Fukugita ; S.Hashimoto ; N.Ishizuka ; Y.Iwasaki ; T.Izubuchi ; K.Kanaya ; T.Kaneko ; Y.Kuramashi ; V.Lesk ; K.-I.Nagai ; J.Noaki ; M.Okawa ; Y.Taniguchi ; A.Ukawa ; T.Yoshi’e ;
Date:	16 Oct 2001
Journal:	Nucl.Phys.Proc.Suppl. 106 (2002) 332-334
Subject:	hep-lat
Abstract:	We present a calculation of the $K opipi$ decay amplitudes from the $K opi$ matrix elements using leading order relations derived in chiral perturbation theory. Numerical simulations are carried out in quenched QCD with the domain-wall fermion action and the renormalization group improved gluon action. Our results show that the I=2 amplitude is reasonably consistent with experiment whereas the I=0 amplitude is sizably smaller. Consequently the $Delta I=1/2$ enhancement is only half of the experimental value, and $epsilon’/epsilon$ is negative.
Source:	arXiv, hep-lat/0110142
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