Neutrino flavor instabilities in a time-dependent supernova model

Abbar, Sajad; Duan, Huaiyu

doi:10.1016/j.physletb.2015.10.019

Title: Neutrino flavor instabilities in a time-dependent supernova model

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Abstract

In this study, a dense neutrino medium such as that inside a core-collapse supernova can experience collective flavor conversion or oscillations because of the neutral-current weak interaction among the neutrinos. This phenomenon has been studied in a restricted, stationary supernova model which possesses the (spatial) spherical symmetry about the center of the supernova and the (directional) axial symmetry around the radial direction. Recently it has been shown that these spatial and directional symmetries can be broken spontaneously by collective neutrino oscillations. In this letter we analyze the neutrino flavor instabilities in a time-dependent supernova model. Our results show that collective neutrino oscillations start at approximately the same radius in both the stationary and time-dependent supernova models unless there exist very rapid variations in local physical conditions on timescales of a few microseconds or shorter. Our results also suggest that collective neutrino oscillations can vary rapidly with time in the regimes where they do occur which need to be studied in time-dependent supernova models.

Authors:

Abbar, Sajad;

Publication Date:: Tue Dec 01 00:00:00 EST 2015

Research Org.:: Univ. of New Mexico, Albuquerque, NM (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1242860

Alternate Identifier(s):: OSTI ID: 1239973

Grant/Contract Number:: SC0008142

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 751 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; neutrino oscillations; core-collapse supernova

Citation Formats


                    Abbar, Sajad, and Duan, Huaiyu. Neutrino flavor instabilities in a time-dependent supernova model.  Netherlands: N. p., 2015. 
Web.  doi:10.1016/j.physletb.2015.10.019.

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                    Abbar, Sajad, & Duan, Huaiyu. Neutrino flavor instabilities in a time-dependent supernova model.  Netherlands.  https://doi.org/10.1016/j.physletb.2015.10.019

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                    Abbar, Sajad, and Duan, Huaiyu. Tue .  
"Neutrino flavor instabilities in a time-dependent supernova model".  Netherlands.  https://doi.org/10.1016/j.physletb.2015.10.019.

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@article{osti_1242860,

  title        = {Neutrino flavor instabilities in a time-dependent supernova model},

  author       = {Abbar, Sajad and Duan, Huaiyu},

  abstractNote = {In this study, a dense neutrino medium such as that inside a core-collapse supernova can experience collective flavor conversion or oscillations because of the neutral-current weak interaction among the neutrinos. This phenomenon has been studied in a restricted, stationary supernova model which possesses the (spatial) spherical symmetry about the center of the supernova and the (directional) axial symmetry around the radial direction. Recently it has been shown that these spatial and directional symmetries can be broken spontaneously by collective neutrino oscillations. In this letter we analyze the neutrino flavor instabilities in a time-dependent supernova model. Our results show that collective neutrino oscillations start at approximately the same radius in both the stationary and time-dependent supernova models unless there exist very rapid variations in local physical conditions on timescales of a few microseconds or shorter. Our results also suggest that collective neutrino oscillations can vary rapidly with time in the regimes where they do occur which need to be studied in time-dependent supernova models.},

  doi          = {10.1016/j.physletb.2015.10.019},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 751,

  place        = {Netherlands},

  year         = {Tue Dec 01 00:00:00 EST 2015},

  month        = {Tue Dec 01 00:00:00 EST 2015}

}

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