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Heavy baryon spectroscopy from the lattice

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Heavy baryon spectroscopy from the lattice

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dc.contributor.author	Bowler, Ken C.
dc.contributor.author	Kenway, Richard D.
dc.contributor.author	Oliveira, O.
dc.contributor.author	Richards, D.G.
dc.contributor.author	Ueberholz, Peer
dc.contributor.author	Lellouch, Laurent
dc.contributor.author	Nieves Pamplona, Juan Miguel
dc.contributor.author	Sachrajda, Christopher T.
dc.contributor.author	Stella, N.
dc.contributor.author	Wittig, Hartmut
dc.date.accessioned	2014-10-16T12:01:08Z
dc.date.available	2014-10-16T12:01:08Z
dc.date.issued	1996
dc.identifier.citation	Bowler, Ken C. Kenway, Richard D. Oliveira, O. Richards, D.G. Ueberholz, Peer Lellouch, Laurent Nieves Pamplona, Juan Miguel Sachrajda, Christopher T. Stella, N. Wittig, Hartmut 1996 Heavy baryon spectroscopy from the lattice Physical Review D 54 5 3619 3633
dc.identifier.uri	http://hdl.handle.net/10550/39216
dc.description.abstract	The results of an exploratory lattice study of heavy baryon spectroscopy are presented. We have computed the full spectrum of the eight baryons containing a single heavy quark, on a 24(3) X 48 lattice at beta=6.2, using an O(a)-improved fermion action. We discuss the lattice baryon operators and give a method for isolating the contributions of the spin doublets (Sigma,Sigma), (Xi',Xi), and (Omega,Omega) to the correlation function of the relevant operator. We compare our results with the available experimental data and find good agreement in both the charm and the b-quark sectors, despite the long extrapolation in the heavy quark mass needed in the latter case. We also predict the masses of several undiscovered baryons. We compute the Lambda-pseudoscalar meson and Sigma-Lambda mass splittings. Our results, which have errors in the range 10-30%, are in good agreement with the experimental numbers. For the Sigma*-Sigma mass splitting, we find results considerably smaller than the experimental values for both the charm and the b-flavored baryons, although in the latter case the experimental results are still preliminary. This is also the case for the lattice results for the hyperfine splitting for the heavy mesons.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 1996, vol. 54, num. 5, p. 3619-3633
dc.subject	Física
dc.title	Heavy baryon spectroscopy from the lattice
dc.type	journal article	es_ES
dc.date.updated	2014-10-16T12:01:08Z
dc.identifier.doi	10.1103/PhysRevD.54.3619
dc.identifier.idgrec	068615
dc.rights.accessRights	open access	es_ES