Fast Neutrino Flavor Conversion Modes in Multidimensional Core-collapse Supernova Models: the Role of the Asymmetric Neutrino Distributions

摘要: A dense neutrino gas, such as the one anticipated in supernova environment, can experience fast flavor conversions on scales much shorter than those expected vacuum probably provided that angular distributions of ${\ensuremath{\nu}}_{e}$ and ${\overline{\ensuremath{\nu}}}_{e}$ cross each other. We perform a detailed investigation obtained by solving Boltzmann equations for fixed matter profiles some representative snapshots during postbounce phase core-collapse supernovae multidimensional calculations $11.2\text{ }\text{ }{\mathrm{M}}_{\ensuremath{\bigodot}}$ $27\text{ progenitor model. Although model features ${\ensuremath{\nu}}_{e}\ensuremath{-}{\overline{\ensuremath{\nu}}}_{e}$ crossings associated modes at different time snapshots, does not show any within decoupling region. this be understood studying multipole components distributions. In fact, there is higher chance occurrence zones where are strong enough. also exist more crossing between ${\overline{\ensuremath{\nu}}}_{e}$. addition, apart from region, class appears very deep inside protoneutron star.