NAGIOS: RODERIC FUNCIONANDO

Large N-c Weinberg-Tomozawa interaction and negative parity s-wave baryon resonances

Repositori DSpace/Manakin

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Large N-c Weinberg-Tomozawa interaction and negative parity s-wave baryon resonances

Mostra el registre parcial de l'element

dc.contributor.author García Recio, Carmen
dc.contributor.author Nieves Pamplona, Juan Miguel
dc.contributor.author Salcedo, Lorenzo Luis
dc.date.accessioned 2014-10-22T11:01:31Z
dc.date.available 2014-10-22T11:01:31Z
dc.date.issued 2006
dc.identifier.citation García Recio, Carmen Nieves Pamplona, Juan Miguel Salcedo, Lorenzo Luis 2006 Large N-c Weinberg-Tomozawa interaction and negative parity s-wave baryon resonances Physical Review D 74 3 036004
dc.identifier.uri http://hdl.handle.net/10550/39297
dc.description.abstract It is shown that in the 70 and 700 SU(6) irreducible spaces, the SU(6) extension of the Weinberg-Tomozawa (WT) s-wave meson-baryon interaction incorporating vector mesons (hep-ph/0505233) scales as O(N-c(0)), instead of the well-known O(N-c(-1)) behavior for its SU(3) counterpart. However, the WT interaction behaves as order O(N-c(-1)) within the 56 and 1134 meson-baryon spaces. Explicit expressions for the WT couplings (eigenvalues) in the irreducible SU(2N(F)) spaces, for arbitrary N-F and N-c, are given. This extended interaction is used as a kernel of the Bethe Salpeter equation, to study the large N-c scaling of masses and widths of the lowest-lying negative parity s-wave baryon resonances. Analytical expressions are found in the N-c ->infinity limit, from which it can be deduced that resonance widths and excitation energies (M-R-M) behave as order O(N-c(0)), in agreement with model independent arguments, and moreover they fall in the 70-plet, as expected in constituent quark models for an orbital excitation. For the 56 and 1134 spaces, excitation energies and widths grow O(N-c(1/2)) indicating that such resonances do not survive in the large N-c limit. The relation of this latter N-c behavior with the existence of exotic components in these resonances is discussed. The interaction comes out repulsive in the 700.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2006, vol. 74, num. 3, p. 036004
dc.subject Física
dc.title Large N-c Weinberg-Tomozawa interaction and negative parity s-wave baryon resonances
dc.type journal article es_ES
dc.date.updated 2014-10-22T11:01:31Z
dc.identifier.doi 10.1103/PhysRevD.74.036004
dc.identifier.idgrec 068579
dc.rights.accessRights open access es_ES

Visualització       (428.2Kb)

Aquest element apareix en la col·lecció o col·leccions següent(s)

Mostra el registre parcial de l'element

Cerca a RODERIC

Cerca avançada

Visualitza

Estadístiques