On the occurrence of fast neutrino flavor conversions in multidimensional supernova models - Archive ouverte HAL
Article Dans Une Revue Physical Review D Année : 2019

On the occurrence of fast neutrino flavor conversions in multidimensional supernova models

Huaiyu Duan
  • Fonction : Auteur
Kohsuke Sumiyoshi
  • Fonction : Auteur
Tomoya Takiwaki
  • Fonction : Auteur
Maria Cristina Volpe

Résumé

The dense neutrino medium in a core-collapse supernova or a neutron-star merger event can experience fast flavor conversions on time/distance scales that are much smaller than those of vacuum oscillations. It is believed that fast neutrino flavor transformation occurs in the region where the angular distributions of νe and ν¯e cross each other. We present the first study of this crossing phenomenon and the fast neutrino flavor conversions in multidimensional (multi-D) supernova models. We examine the neutrino distributions obtained by solving the Boltzmann transport equation for several fixed profiles which are representative snapshots taken from separate 2D and 3D supernova simulations with an 11.2  M⊙ progenitor model. Our research shows that the spherically asymmetric patterns of the νe and ν¯e fluxes in multi-D models can assist the appearance of the crossing between the νe and ν¯e angular distributions. In the models that we have studied, there exist unstable neutrino oscillation modes in and beyond the neutrino decoupling region which have amplitude growth rates as large as an e-fold per nanosecond. This finding can have important consequences for the explosion mechanism, nucleosynthesis, and neutrino signals of core-collapse supernovae.

Dates et versions

hal-01975046 , version 1 (09-01-2019)

Identifiants

Citer

Sajad Abbar, Huaiyu Duan, Kohsuke Sumiyoshi, Tomoya Takiwaki, Maria Cristina Volpe. On the occurrence of fast neutrino flavor conversions in multidimensional supernova models. Physical Review D, 2019, 100 (4), pp.043004. ⟨10.1103/PhysRevD.100.043004⟩. ⟨hal-01975046⟩
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