7–11 Aug 2017
Columbus, Ohio, USA
US/Eastern timezone

Neutrino flavour conversions near the supernova core

7 Aug 2017, 14:15
15m
Athenian Room (The Athenaeum)

Athenian Room

The Athenaeum

Oral Neutrinos (astrophysical, atmospheric) Neutrinos

Speaker

Francesco Capozzi (The Ohio State University)

Description

Supernova neutrinos can experience “fast” self-induced flavor conversions almost immediately above the core, with important implications for the explosion mechanism and nucleosynthesis. Very recently, a novel method has been proposed to investigate these phenomena, in terms of the dispersion relation for the complex frequency and wave number (ω, k) of disturbances in the mean field of the νe-νx flavour coherence. I discuss a systematic approach to such instabilities, originally developed in the context of plasma physics. Instabilities are typically seen to emerge for complex ω, and can be further characterized as convective (moving away faster than they spread) and absolute (growing locally), depending on k-dependent features. The analytical classification of both unstable and stable modes leads not only to qualitative insights about their features but also to quantitative predictions about the growth rates of instabilities.

Primary authors

Francesco Capozzi (The Ohio State University) Basudeb Dasgupta (Tata Institute of Fundamental Research, Mumbai) Eligio Lisi (INFN, Bari, Italy) Dr Antonio Marrone (Univ. of Bari) Alessandro Mirizzi

Presentation materials