The rho meson in nuclear matter - a chiral unitary approach

Details The rho meson in nuclear matter - a chiral unitary approach The rho meson in nuclear matter - a chiral unitary approach

2001-07-16

arxiv.org/abs/nucl-th/0107046v1

AIP Conf.Proc. 603 (2001) 237-240

Physics

Nuclear Physics

Nuclear Theory

5 pages, 5 figures. Presented at Mesons and Light Nuclei '01, Prague, Czech Republic, July 2-6, 2001. To be published in the p

Scientific paper

10.1063/1.1436605

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 ($\chi PT$) lagrangian including explicit resonance fields. Low energy chiral constraints are considered by matching our expressions to those of one loop $\chi PT$. To account for the medium corrections, the $\rho$ couples to $\pi\pi$ 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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