$B_K$ from quenched QCD with exact chiral symmetry

We present a calculation of the standard model Delta S=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 16^3x32 lattice that has a lattice spacin...

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Detalles Bibliográficos
Autores principales: Garron, Nicolas, Giusti, Leonardo, Hoelbling, Christian, Lellouch, Laurent, Rebbi, Claudio
Lenguaje:eng
Publicado: 2003
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.92.042001
http://cds.cern.ch/record/626245
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author Garron, Nicolas
Giusti, Leonardo
Hoelbling, Christian
Lellouch, Laurent
Rebbi, Claudio
author_facet Garron, Nicolas
Giusti, Leonardo
Hoelbling, Christian
Lellouch, Laurent
Rebbi, Claudio
author_sort Garron, Nicolas
collection CERN
description We present a calculation of the standard model Delta S=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 16^3x32 lattice that has a lattice spacing asim 0.1 fm. The resulting bare matrix element is renormalized non-perturbatively. Our main result is B_K^{RGI}=0.87(8)^{+2+14}_{-1-14}, where the first error is statistical, the second is systematic and the third is an estimate of the uncertainty associated with the quenched approximation and with the fact that our kaons are composed of degenerate s and d quarks with masses sim m_s/2.
id cern-626245
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
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spelling cern-6262452023-03-14T18:43:37Zdoi:10.1103/PhysRevLett.92.042001http://cds.cern.ch/record/626245engGarron, NicolasGiusti, LeonardoHoelbling, ChristianLellouch, LaurentRebbi, Claudio$B_K$ from quenched QCD with exact chiral symmetryParticle Physics - PhenomenologyWe present a calculation of the standard model Delta S=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 16^3x32 lattice that has a lattice spacing asim 0.1 fm. The resulting bare matrix element is renormalized non-perturbatively. Our main result is B_K^{RGI}=0.87(8)^{+2+14}_{-1-14}, where the first error is statistical, the second is systematic and the third is an estimate of the uncertainty associated with the quenched approximation and with the fact that our kaons are composed of degenerate s and d quarks with masses sim m_s/2.We present a calculation of the standard model \Delta S=2 matrix element relevant to indirect CP violation in K->\pi\pi decays which uses Neuberger's chiral formulation of lattice fermions. The computation is performed in the quenched approximation on a 16^3x32 lattice that has a lattice spacing a\sim 0.1 fm. The resulting bare matrix element is renormalized non-perturbatively. Our main result is B_K^{RGI}=0.87(8)^{+2+14}_{-1-14}, where the first error is statistical, the second is systematic and the third is an estimate of the uncertainty associated with the quenched approximation and with the fact that our kaons are composed of degenerate s and d quarks with masses \sim m_s/2.hep-ph/0306295CPT-2003-P-4545CERN-TH-2003-142BUHEP-03-14BU-HEP-2003-14CERN-TH-2003-142CPT-4545oai:cds.cern.ch:6262452003-06-30
spellingShingle Particle Physics - Phenomenology
Garron, Nicolas
Giusti, Leonardo
Hoelbling, Christian
Lellouch, Laurent
Rebbi, Claudio
$B_K$ from quenched QCD with exact chiral symmetry
title $B_K$ from quenched QCD with exact chiral symmetry
title_full $B_K$ from quenched QCD with exact chiral symmetry
title_fullStr $B_K$ from quenched QCD with exact chiral symmetry
title_full_unstemmed $B_K$ from quenched QCD with exact chiral symmetry
title_short $B_K$ from quenched QCD with exact chiral symmetry
title_sort $b_k$ from quenched qcd with exact chiral symmetry
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevLett.92.042001
http://cds.cern.ch/record/626245
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AT giustileonardo bkfromquenchedqcdwithexactchiralsymmetry
AT hoelblingchristian bkfromquenchedqcdwithexactchiralsymmetry
AT lellouchlaurent bkfromquenchedqcdwithexactchiralsymmetry
AT rebbiclaudio bkfromquenchedqcdwithexactchiralsymmetry

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