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Baryonic resonances from baryon decuplet-meson octet interaction

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Baryonic resonances from baryon decuplet-meson octet interaction

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dc.contributor.author Sarkar, S.
dc.contributor.author Oset Báguena, Eulogio
dc.contributor.author Vicente Vacas, Manuel José
dc.date.accessioned 2015-09-08T07:51:57Z
dc.date.available 2015-09-08T07:51:57Z
dc.date.issued 2005
dc.identifier.citation Sarkar, S. Oset Báguena, Eulogio Vicente Vacas, Manuel José 2005 Baryonic resonances from baryon decuplet-meson octet interaction Nuclear Physics A 750 2-4 294 323
dc.identifier.uri http://hdl.handle.net/10550/46941
dc.description.abstract We study S-wave interactions of the baryon decuplet with the octet of pseudoscalar mesons using the lowest order chiral Lagrangian. In the S=1 sector, we find an attractive interaction in the ΔK channel with I=1 while it is repulsive for I=2. The attractive interaction leads to a pole in the second Riemann sheet of the complex plane and is manifested as a large strength in the scattering amplitude close to the ΔK threshold, which is not the case for I=2. We use the unitarized coupled channel approach to also investigate all the other possible values of strangeness and isospin. We find two bound states in the SU(3) limit corresponding to the octet and decuplet representations. These are found to split into eight different trajectories in the complex plane when the SU(3) symmetry is broken gradually. Finally, we are able to provide a reasonable description for a good number of 4-star 3/2− resonances listed by the Particle Data Group. In particular, the Ξ(1820), the Λ(1520) and the Σ(1670) states are well reproduced. We predict a few other resonances and also evaluate the couplings of the observed resonances to the various channels from the residues at the poles of the scattering matrix from where partial decay widths into different channels can be evaluated.
dc.language.iso eng
dc.relation.ispartof Nuclear Physics A, 2005, vol. 750, num. 2-4, p. 294-323
dc.subject Física
dc.title Baryonic resonances from baryon decuplet-meson octet interaction
dc.type journal article es_ES
dc.date.updated 2015-09-08T07:51:58Z
dc.identifier.doi 10.1016/j.nuclphysa.2005.01.006
dc.identifier.idgrec 079380
dc.rights.accessRights open access es_ES

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