Abstract
In this work, the properties of the ρ 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 ( χPT) Lagrangian including explicit resonance fields. Low-energy chiral constraints are considered by matching our expressions to those of one-loop χPT. To account for the medium corrections, the ρ couples to ππ pairs which are properly renormalized in the nuclear medium, accounting for both p–h and Δ–h excitations. The terms where the ρ couples directly to the hadrons in the p–h or Δ–h excitations are also accounted for. In addition, the ρ is also allowed to couple to N ∗ (1520)–h components.
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