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Chiral approach to the rho meson in nuclear matter

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Chiral approach to the rho meson in nuclear matter

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Cabrera Urbán, Daniel; Oset Báguena, Eulogio; Vicente Vacas, Manuel José

Aquest document és un/a article, creat/da en: 2002

In this work, the properties of the rho meson at rest in cold symmetric nuclear matter are studied. We make use of a chiral unitary approach to pion-pion scattering in the vector-isovector channel, calculated from the lowest-order Chiral Perturbation Theory (chiPT) Lagrangian including explicit resonance fields. Low-energy chiral constraints are considered by matching our expressions to those of one-loop chiPT. To account for the medium corrections, the rho couples to pipi pairs which are properly renormalized in the nuclear medium, accounting for both p-h and Delta-h excitations. The terms where the rho couples directly to the hadrons in the p-h or Delta-h excitations are also accounted for. In addition, the rho is also allowed to couple to N*(1520)-h components.

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