NAGIOS: RODERIC FUNCIONANDO

Chiral non-perturbative approach to the isoscalar s-wave pi pi interaction in a nuclear medium

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/

Chiral non-perturbative approach to the isoscalar s-wave pi pi interaction in a nuclear medium

Mostra el registre parcial de l'element

dc.contributor.author Chiang, H.C.
dc.contributor.author Oset Báguena, Eulogio
dc.contributor.author Vicente Vacas, Manuel José
dc.date.accessioned 2014-10-24T07:55:58Z
dc.date.available 2014-10-24T07:55:58Z
dc.date.issued 1998
dc.identifier.citation Chiang, H.C. Oset Báguena, Eulogio Vicente Vacas, Manuel José 1998 Chiral non-perturbative approach to the isoscalar s-wave pi pi interaction in a nuclear medium Nuclear Physics A 644 1-2 77 92
dc.identifier.uri http://hdl.handle.net/10550/39335
dc.description.abstract The s-wave isoscalar amplitude for pi pi scattering in a nuclear medium is evaluated using a nonperturbative unitary coupled channels method and the standard chiral Lagrangians. The method has proved successful to describe the pi pi properties in the scalar-isoscalar channel up to 1.2 GeV, giving rise to poles in the t matrix for the f(0)(980) and the sigma. The extension of the method to the nuclear medium implies not only the renormalization of the pions in the medium, but also the introduction of interaction terms related to contact terms in the pi N --> pi pi N interaction. Off-shell effects are also shown to be important leading to cancellations which reduce the coupled channel integral equations to a set of algebraic equations. As the density increases we find a reduction of strength below the a region and a certain accumulation of strength at energies around pion threshold. Our results, based on chiral Lagrangians, provide similar results to those obtained with phenomenological models which impose minimal chiral constraints.
dc.language.iso eng
dc.relation.ispartof Nuclear Physics A, 1998, vol. 644, num. 1-2, p. 77-92
dc.subject Física
dc.title Chiral non-perturbative approach to the isoscalar s-wave pi pi interaction in a nuclear medium
dc.type journal article es_ES
dc.date.updated 2014-10-24T07:55:58Z
dc.identifier.doi 10.1016/S0375-9474(98)00578-8
dc.identifier.idgrec 079427
dc.rights.accessRights open access es_ES

Visualització       (199.6Kb)

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