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Title: Fast neutrino flavor conversion modes in multidimensional core-collapse supernova models: The role of the asymmetric neutrino distributions

Abstract

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

Authors:
 [1]; ORCiD logo [2];  [3];  [4];  [5]
  1. Univ. Denis Diderot, Paris (France); Univ. of New Mexico, Albuquerque, NM (United States)
  2. Univ. of New Mexico, Albuquerque, NM (United States)
  3. National Inst. of Technology, Numazu College, Ooka Numazu, Shizuoka (Japan)
  4. National Astronomical Observatory of Japan, Osawa, Mitaka, Tokyo (Japan)
  5. Univ. Denis Diderot, Paris (France)
Publication Date:
Research Org.:
Univ. of New Mexico, Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1601660
Grant/Contract Number:  
SC0017803
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 101; Journal Issue: 4; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Abbar, Sajad, Duan, Huaiyu, Sumiyoshi, Kohsuke, Takiwaki, Tomoya, and Volpe, Maria Cristina. Fast neutrino flavor conversion modes in multidimensional core-collapse supernova models: The role of the asymmetric neutrino distributions. United States: N. p., 2020. Web. doi:10.1103/physrevd.101.043016.
Abbar, Sajad, Duan, Huaiyu, Sumiyoshi, Kohsuke, Takiwaki, Tomoya, & Volpe, Maria Cristina. Fast neutrino flavor conversion modes in multidimensional core-collapse supernova models: The role of the asymmetric neutrino distributions. United States. doi:https://doi.org/10.1103/physrevd.101.043016
Abbar, Sajad, Duan, Huaiyu, Sumiyoshi, Kohsuke, Takiwaki, Tomoya, and Volpe, Maria Cristina. Thu . "Fast neutrino flavor conversion modes in multidimensional core-collapse supernova models: The role of the asymmetric neutrino distributions". United States. doi:https://doi.org/10.1103/physrevd.101.043016. https://www.osti.gov/servlets/purl/1601660.
@article{osti_1601660,
title = {Fast neutrino flavor conversion modes in multidimensional core-collapse supernova models: The role of the asymmetric neutrino distributions},
author = {Abbar, Sajad and Duan, Huaiyu and Sumiyoshi, Kohsuke and Takiwaki, Tomoya and Volpe, Maria Cristina},
abstractNote = {A dense neutrino gas, such as the one anticipated in the supernova environment, can experience fast neutrino flavor conversions on scales much shorter than those expected in vacuum probably provided that the angular distributions of νe and $\bar{v}_e$ cross each other. We perform a detailed investigation of the neutrino angular distributions obtained by solving the Boltzmann equations for fixed matter profiles of some representative snapshots during the postbounce phase of core-collapse supernovae in multidimensional calculations of a 11.2 M⊙ and a 27 M⊙ progenitor model. Although the 11.2 M⊙ model features νe - $\bar{v}_e$ angular crossings and the associated fast modes at different time snapshots, the 27 M⊙ model does not show any crossings within the decoupling region. We show that this can be understood by studying the multipole components of the neutrino distributions. In fact, there is a higher chance for the occurrence of νe - $\bar{v}_e$ angular crossings for the zones where the multipole components of the neutrino distributions are strong enough. We also show that there can exist more than one crossing between the angular distributions of νe and $\bar{v}_e$. In addition, apart from the crossings within the neutrino decoupling region, there is a class of νe - $\bar{v}_e$ angular crossings that appears very deep inside the protoneutron star.},
doi = {10.1103/physrevd.101.043016},
journal = {Physical Review D},
number = 4,
volume = 101,
place = {United States},
year = {2020},
month = {2}
}

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