Neutrino Trapping in a Supernova and Ion Screening
نویسنده
چکیده
Neutrino-nucleus elastic scattering is reduced in dense matter because of correlations between ions. The static structure factor for a plasma of electrons and ions is calculated from Monte Carlo simulations and parameterized with a least squares fit. Our results imply a large increase in the neutrino mean free path. This strongly limits the trapping of neutrinos in a supernova by coherent neutral current interactions. PACS Numbers: 97.60.Bw, 95.30.Cq, 25.30.Pt, 66.10.-x Typeset using REVTEX ∗E-mail: [email protected]
منابع مشابه
Microscopic study of neutrino trapping in hyperon stars
Employing the most recent parametrization of the baryon-baryon interaction of the Nijmegen group, we investigate, in the framework of the Brueckner–Bethe–Goldstone many-body theory at zero temperature, the influence of neutrino trapping on the composition, equation of state, and structure of neutron stars, relevant to describe the physical conditions of a neutron star immediately after birth (p...
متن کاملNuclear properties in early stages of stellar collapse
The spectroscopy of electron capture neutrinos emitted from nearby pre-supernova collapsing stars before the neutrino trapping sets in, can yield useful information on the physical conditions and on the nuclear composition of the core. The neutrino spectrum depends on the thermodynamic conditions of the core, the nuclear abundances, the lepton fractions and relevant nuclear properties. In the p...
متن کاملCoupling between ion-acoustic waves and neutrino oscillations.
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-acoust...
متن کاملNeutrino Spectroscopy of the Early Phase of Nearby Supernovae
Neutrinos emitted during stellar core collapse up to their trapping phase carry information about the stage from which the Supernova explosion process initiates. The dominant e emission mechanism is by electron capture on free protons and f-p shell nuclei and the spectrum of these neutrinos is a function of the ambient physical conditions within the core as well as the nuclear equation of state...
متن کاملv 1 2 0 Ju l 1 99 7 Neutrino Spectroscopy of the Early Phase of Nearby Supernovae
Neutrinos emitted during stellar core collapse up to their trapping phase carry information about the stage from which the Supernova explosion process initiates. The dominant νe emission mechanism is by electron capture on free protons and f-p shell nuclei and the spectrum of these neutrinos is a function of the ambient physical conditions within the core as well as the nuclear equation of stat...
متن کامل