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Couplings in coupled channels versus wave functions in the case of resonances: Application to the two A(1405) states

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Couplings in coupled channels versus wave functions in the case of resonances: Application to the two A(1405) states

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dc.contributor.author Yamagata-Sekihara, Junko
dc.contributor.author Nieves Pamplona, Juan Miguel
dc.contributor.author Oset Báguena, Eulogio
dc.date.accessioned 2014-10-28T09:33:46Z
dc.date.available 2014-10-28T09:33:46Z
dc.date.issued 2011
dc.identifier.citation Yamagata-Sekihara, Junko Nieves Pamplona, Juan Miguel Oset Báguena, Eulogio 2011 Couplings in coupled channels versus wave functions in the case of resonances: Application to the two A(1405) states Physical Review D 83 1 014003
dc.identifier.uri http://hdl.handle.net/10550/39402
dc.description.abstract In this paper we develop a formalism to evaluate wave functions in momentum and coordinate space for the resonant states dynamically generated in a unitary coupled channel approach. The on shell approach for the scattering matrix, commonly used, is also obtained in Quantum Mechanics with a separable potential, which allows one to write wave functions in a trivial way. We develop useful relationships among the couplings of the dynamically generated resonances to the different channels and the wave functions at the origin. The formalism provides an intuitive picture of the resonances in the coupled channel approach, as bound states of one bound channel, which decays into open ones. It also provides an insight and practical rules for evaluating couplings of the resonances to external sources and how to deal with final state interaction in production processes. As an application of the formalism we evaluate the wave functions of the two Λ(1405) states in the πΣ, K¯N and other coupled channels.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2011, vol. 83, num. 1, p. 014003
dc.subject Física
dc.title Couplings in coupled channels versus wave functions in the case of resonances: Application to the two A(1405) states
dc.type journal article es_ES
dc.date.updated 2014-10-28T09:33:46Z
dc.identifier.doi 10.1103/PhysRevD.83.014003
dc.identifier.idgrec 068051
dc.rights.accessRights open access es_ES

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