skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Self-induced temporal instability from a neutrino antenna

Abstract

It has been recently shown that the flavor composition of a self-interacting neutrino gas can spontaneously acquire a time-dependent pulsating component during its flavor evolution. In this work, we perform a more detailed study of this effect in a model where neutrinos are assumed to be emitted in a two-dimensional plane from an infinite line that acts as a neutrino antenna. We consider several examples with varying matter and neutrino densities and find that temporal instabilities with various frequencies are excited in a cascade. We compare the numerical calculations of the flavor evolution with the predictions of linearized stability analysis of the equations of motion. The results obtained with these two approaches are in good agreement in the linear regime, while a dramatic speed-up of the flavor conversions occurs in the non-linear regime due to the interactions among the different pulsating modes. We show that large flavor conversions can take place if some of the temporal modes are unstable for long enough, and that this can happen even if the matter and neutrino densities are changing, as long as they vary slowly.

Authors:
 [1];  [2];  [3];  [4];  [2]
  1. Dipartimento di Fisica e Astronomia “Galileo Galilei”,Via Marzolo 8, 35131 Padova (Italy)
  2. (Italy)
  3. Tata Institute of Fundamental Research,Homi Bhabha Road, Mumbai, 400005 (India)
  4. Dipartimento Interateneo di Fisica “Michelangelo Merlin”,Via Amendola 173, 70126 Bari (Italy)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22572064
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 04; Other Information: PUBLISHER-ID: JCAP04(2016)043; OAI: oai:repo.scoap3.org:15316; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; EQUATIONS OF MOTION; FLAVOR MODEL; INSTABILITY; NEUTRINOS; NONLINEAR PROBLEMS; NUMERICAL ANALYSIS; SUPERNOVAE; TIME DEPENDENCE; TWO-DIMENSIONAL CALCULATIONS

Citation Formats

Capozzi, Francesco, INFN - Sezione di Padova,Via Marzolo 8, 35131 Padova, Dasgupta, Basudeb, Mirizzi, Alessandro, and INFN - Sezione di Bari,Via Amendola 173, 70126 Bari. Self-induced temporal instability from a neutrino antenna. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/04/043.
Capozzi, Francesco, INFN - Sezione di Padova,Via Marzolo 8, 35131 Padova, Dasgupta, Basudeb, Mirizzi, Alessandro, & INFN - Sezione di Bari,Via Amendola 173, 70126 Bari. Self-induced temporal instability from a neutrino antenna. United States. doi:10.1088/1475-7516/2016/04/043.
Capozzi, Francesco, INFN - Sezione di Padova,Via Marzolo 8, 35131 Padova, Dasgupta, Basudeb, Mirizzi, Alessandro, and INFN - Sezione di Bari,Via Amendola 173, 70126 Bari. Thu . "Self-induced temporal instability from a neutrino antenna". United States. doi:10.1088/1475-7516/2016/04/043.
@article{osti_22572064,
title = {Self-induced temporal instability from a neutrino antenna},
author = {Capozzi, Francesco and INFN - Sezione di Padova,Via Marzolo 8, 35131 Padova and Dasgupta, Basudeb and Mirizzi, Alessandro and INFN - Sezione di Bari,Via Amendola 173, 70126 Bari},
abstractNote = {It has been recently shown that the flavor composition of a self-interacting neutrino gas can spontaneously acquire a time-dependent pulsating component during its flavor evolution. In this work, we perform a more detailed study of this effect in a model where neutrinos are assumed to be emitted in a two-dimensional plane from an infinite line that acts as a neutrino antenna. We consider several examples with varying matter and neutrino densities and find that temporal instabilities with various frequencies are excited in a cascade. We compare the numerical calculations of the flavor evolution with the predictions of linearized stability analysis of the equations of motion. The results obtained with these two approaches are in good agreement in the linear regime, while a dramatic speed-up of the flavor conversions occurs in the non-linear regime due to the interactions among the different pulsating modes. We show that large flavor conversions can take place if some of the temporal modes are unstable for long enough, and that this can happen even if the matter and neutrino densities are changing, as long as they vary slowly.},
doi = {10.1088/1475-7516/2016/04/043},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 04,
volume = 2016,
place = {United States},
year = {Thu Apr 21 00:00:00 EDT 2016},
month = {Thu Apr 21 00:00:00 EDT 2016}
}