title: Coupling between ion-acoustic waves and neutrino oscillations.
abstract: The work investigates the coupling between ion-acoustic waves and neutrino flavor oscillations in a nonrelativistic electron-ion plasma under the influence of a mixed neutrino beam. Neutrino oscillations are mediated by the flavor polarization vector dynamics in a material medium. The linear dispersion relation around homogeneous static equilibria is developed. When resonant with the ion-acoustic mode, the neutrino flavor oscillations can transfer energy to the plasma exciting a new fast unstable mode in extreme astrophysical scenarios. The growth rate and the unstable wavelengths are determined in typical type II supernova parameters. The predictions can be useful for a new indirect probe on neutrino oscillations in nature.
authors.affiliation: Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970 Porto Alegre, RS, Brasil.
authors.forename: Fernando
authors.initials: F
authors.lastname: Haas
authors.affiliation: Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970 Porto Alegre, RS, Brasil.
authors.forename: Kellen Alves
authors.initials: KA
authors.lastname: Pascoal
authors.affiliation: IPFN, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal and Instituto de Física, Universidade de São Paulo, 05508-090 São Paulo, SP, Brasil.
authors.forename: José Tito
authors.initials: JT
authors.lastname: Mendonça