Excited baryons from Bayesian priors and overlap fermions

Simple item page
dc.creatorLee, F. X.
dc.creatorDong, S. J.
dc.creatorDraper, T.
dc.creatorHorvath, I.
dc.creatorLiu, K. F.
dc.creatorMathur, N.
dc.creatorZhang, J. B.
dc.date2002-08-29
dc.date.accessioned2026-07-07T11:30:35Z
dc.date.available2026-07-07T11:30:35Z
dc.descriptionUsing the constrained-fitting method based on Bayesian priors, we extract the masses of the two lowest states of octet and decuplet baryons with both parities. The calculation is done on quenched 16^3x28 lattices of a=0.2 fm using an improved gauge action and overlap fermions, with the pion mass as low as 180 MeV. The Roper state N(1440)1/2+ is clearly observed for the first time as the 1st-excited state of the nucleon from the standard interpolating field. Together with other baryons, our preliminary results indicate that the level-ordering of the low-lying baryon states on the lattice is largely consistent with experiment. The realization is helped by cross-overs between the excited 1/2+ and 1/2- states in the region of pion mass from 300 to 400 MeV.
dc.description3 pages, 5 figures, talk at Lattice 2002 (spectrum)
dc.identifierhttps://arxiv.org/abs/hep-lat/0208070
dc.identifierhttp://arxiv.org/abs/hep-lat/0208070
dc.identifierNucl.Phys.Proc.Suppl.119:296-298,2003
dc.identifierdoi:10.1016/S0920-5632(03)01543-3
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197043
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleExcited baryons from Bayesian priors and overlap fermions
dc.typetext

Files

Collections

arXiv