Hyperon vector coupling f{sub 1}(0) from 2+1 flavor lattice QCD

We present results for the hyperon vector form factor f{sub 1} for {Xi}{sup 0}{yields}{Sigma}{sup +}l{nu}-bar and {Sigma}{sup -}{yields}nl{nu}-bar semileptonic decays from dynamical lattice QCD with domain-wall quarks. Simulations are performed on the 2+1 flavor gauge configurations generated by the...

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Bibliographic Details
Published in:AIP conference proceedings 2011-01, Vol.1388 (1)
Main Author: Sasaki, Shoichi
Format: Article
Language:English
Subjects:
BARYONS
BOSONS
COMPOSITE MODELS
CONSTRUCTIVE FIELD THEORY
CORRECTIONS
COUPLING
DECAY
DIMENSIONLESS NUMBERS
ELECTROMAGNETIC FORM FACTORS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FORM FACTORS
GEV RANGE
HADRONS
HYPERONS
LATTICE FIELD THEORY
LEPTONS
LIE GROUPS
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MESONS
MEV RANGE
NEUTRINOS
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
REST MASS
SEMILEPTONIC DECAY
SIGMA BARYONS
STRANGE PARTICLES
SU GROUPS
SU-3 GROUPS
SYMMETRY GROUPS
WEAK PARTICLE DECAY
XI BARYONS
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Summary:We present results for the hyperon vector form factor f{sub 1} for {Xi}{sup 0}{yields}{Sigma}{sup +}l{nu}-bar and {Sigma}{sup -}{yields}nl{nu}-bar semileptonic decays from dynamical lattice QCD with domain-wall quarks. Simulations are performed on the 2+1 flavor gauge configurations generated by the RBC and UKQCD Collaborations with a lattice cutoff of a{sup -1} = 1.7 GeV. Our preliminary results, which are calculated at the lightest sea quark mass (pion mass down to approximately 330 MeV), show that a sign of the second-order correction of SU(3) breaking on hyperon vector coupling f{sub 1}(0) is likely negative.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.3647427