Flavor evolution in binary neutron star mergers and nonlinear feedback

by Ms Amelie Chatelain (APC Paris, France)

Thursday 18 May 2017, 11:15 → 12:15 Europe/Berlin

C31 (Container)

Neutrino flavor conversion studies based on astrophysical environments usually implement neutrino mixings, neutrino interactions with matter, and neutrino self-interactions. In anisotropic media, the most general mean-field treatment includes neutrino mass contributions as well, which introduce a coupling between neutrinos and antineutrinos termed helicity or spin coherence. We explore the role of these mean-field contributions on flavor evolution in the context of a binary neutron star merger remnants. We find that resonance conditions can be satisfied in neutron star merger scenarios while adiabaticity is not sufficient for efficient flavor conversion. We analyze our numerical findings by discussing general conditions to have multiple Mikheyev-Smirnov-Wolfenstein-like resonances, in the presence of nonlinear feedback.