http://arxiv.org/abs/1709.06858
We study the effects of non-standard self-interactions (NSSI) of neutrinos streaming out of a core-collapse supernova. We show that with NSSI, the standard linear stability analysis gives rise to linearly as well as exponentially growing solutions. We demonstrate analytically that flavor-preserving NSSI lead to suppression of collective oscillations, while flavor-violating NSSI allow an earlier onset with enhanced growth rate of oscillations. In the intersecting four-beam model, we show that flavor-violating NSSI can lead to fast oscillations even when the angle between the neutrino and antineutrino beams is obtuse, which is forbidden in the standard model. This leads to the new possibility of fast oscillations in a two-beam system with opposing neutrino-antineutrino fluxes, even in the absence of any spatial inhomogeneities. Finally, we solve the full non-linear equations of motion in the four-beam model numerically, and explore the interplay of fast and slow flavor conversions in the long-time behavior, in the presence of NSSI.
A. Dighe and M. Sen
Fri, 22 Sep 17
34/75
Comments: 12 pages, Revtex style, 15 figures