g{sub A} and Octet Axial Charges

Journal Article · Thu Dec 17 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3293956· OSTI ID:21325778

Lin, H -W ^[1]

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1. Jefferson Laboratory, 12000 Jefferson Avenue, Newport News, VA 23606 (United States)

We review recent progress on lattice calculations of nucleon axial coupling constants, as well as couplings of other octet members. With a combined SU(3) fit to all octet baryons, we find a better determination of g{sub A} = 1.18(4){sub stat}(6){sub syst}. Our predictions for g{sub {sigma}}{sub {sigma}} 0.450(21){sub stat}(27){sub syst} and g{sub {xi}}{sub {xi}} -0.277(15){sub stat}(19){sub syst} are better determined than previous theoretical estimations. Finally, we describe a preliminary first full-QCD calculation of semileptonic decay quantity (g{sub 1}(0)/f{sub 1}(0)){sub {sigma}}{sub {yields}}{sub n} -0.348(37)

• OSTI ID: 21325778
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1182; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON OCTETS
COUPLING CONSTANTS
FORM FACTORS
LATTICE FIELD THEORY
NUCLEONS
QUANTUM CHROMODYNAMICS
QUANTUM ELECTRODYNAMICS
SEMILEPTONIC DECAY
SIGMA BARYONS
SU-3 GROUPS
SUM RULES
XI BARYONS