BK from quenched QCD with exact chiral symmetry

BK from quenched QCD with exact chiral symmetry

We present a calculation of the standard model DeltaS=2 matrix element relevant to indirect CP violation in K-->pipi decays which uses Neuberger's chiral formulation of lattice fermions. The computation is performed in the quenched approximation on a 16(3) x 32 lattice that has a lattice spa...

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Veröffentlicht in:Physical review letters 2004-01, Vol.92 (4), p.042001-042001
Hauptverfasser: Garron, Nicolas, Giusti, Leonardo, Hoelbling, Christian, Lellouch, Laurent, Rebbi, Claudio
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container_end_page 042001
container_issue 4
container_start_page 042001
container_title Physical review letters
container_volume 92
creator Garron, Nicolas
Giusti, Leonardo
Hoelbling, Christian
Lellouch, Laurent
Rebbi, Claudio
description We present a calculation of the standard model DeltaS=2 matrix element relevant to indirect CP violation in K-->pipi decays which uses Neuberger's chiral formulation of lattice fermions. The computation is performed in the quenched approximation on a 16(3) x 32 lattice that has a lattice spacing a approximately 0.1 fm. The resulting bare matrix element is renormalized nonperturbatively. Our main result is B(RGI)(K)=0.87(8)+2+14-1-14, where the first error is statistical, the second is systematic, and the third is Sharpe's estimate of quenching and flavor-SU(3) breaking uncertainties.
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title BK from quenched QCD with exact chiral symmetry
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