Origin of resonances in the chiral unitary approach

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dc.creatorHyodo, Tetsuo
dc.creatorJido, Daisuke
dc.creatorHosaka, Atsushi
dc.date2008-03-17
dc.date2008-07-28
dc.date.accessioned2026-07-07T11:49:09Z
dc.date.available2026-07-07T11:49:09Z
dc.descriptionWe study the origin of the resonances associated with pole singularities of the scattering amplitude in the chiral unitary approach. We propose a "natural renormalization" scheme using the low-energy interaction and the general principle of the scattering theory. We develop a method to distinguish dynamically generated resonances from genuine quark states [Castillejo-Dalitz-Dyson (CDD) poles] using the natural renormalization scheme and phenomenological fitting. Analyzing physical meson-baryon scatterings, we find that the Lambda(1405) resonance is largely dominated by the meson-baryon molecule component. In contrast, the N(1535) resonance requires a sizable CDD pole contribution, while the effect of the meson-baryon dynamics is also important.
dc.descriptionRevTeX4, 14 pages, 4 figures, 4 tables, title changed by editors, final version to appear in Phys. Rev. C
dc.identifierhttps://arxiv.org/abs/0803.2550
dc.identifierhttp://arxiv.org/abs/0803.2550
dc.identifierPhys.Rev.C78:025203,2008
dc.identifierdoi:10.1103/PhysRevC.78.025203
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203138
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOrigin of resonances in the chiral unitary approach
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