Collective modes in strange and isospin asymmetric hadronic matter

MIGUEL AGUIRRE, RICARDO; L DE PAOLI, A

PHYSICS LETTERS B

ELSEVIER SCIENCE BV

Año: 2004 vol. 603 p. 13 - 20

0370-2693

We study the propagation of non-strange and strange meson modes in hadronic matter considering both isospin and strangeness mixing induced by quantum fluctuations in the medium. Baryons are described using the quark?meson coupling model extended to include interactions of strange quarks. In particular, we evaluate the dependence of the meson masses on the baryonic density, the strangeness fraction and the isospin asymmetry of the medium. We have found a considerable admixture of strangeness and isospin in the σ -mode in the high density regime.