Neutrino oscillations and decoherence in short-GRB progenitors

Neutrinos are produced in cosmic accelerators, like active galactic nuclei (AGNs), blazars, supernova (SN) remnants and gamma-ray bursts (GRBs). On their way to the Earth they experience flavor-oscillations. The interactions of the neutrinos coming from the source with other particles, e.g. intergal...

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Detalles Bibliográficos
Autores principales: Penacchioni, Ana Virginia, Civitarese, Enrique Osvaldo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Exactas
Física
astroparticle physics
black hole physics
gamma-ray burst: general
neutrinos
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125234
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125234
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
astroparticle physics
black hole physics
gamma-ray burst: general
neutrinos
spellingShingle Ciencias Exactas
Física
astroparticle physics
black hole physics
gamma-ray burst: general
neutrinos
Penacchioni, Ana Virginia
Civitarese, Enrique Osvaldo
Neutrino oscillations and decoherence in short-GRB progenitors
topic_facet Ciencias Exactas
Física
astroparticle physics
black hole physics
gamma-ray burst: general
neutrinos
description Neutrinos are produced in cosmic accelerators, like active galactic nuclei (AGNs), blazars, supernova (SN) remnants and gamma-ray bursts (GRBs). On their way to the Earth they experience flavor-oscillations. The interactions of the neutrinos coming from the source with other particles, e.g. intergalactic primordial neutrinos or heavy-mass right-handed neutrinos, in their way to the detector may transform the original wave packet in pointer states. This phenomenon, known as decoherence, becomes important in the reconstruction of processes at the source. In this work we study neutrino emission in short GRBs by adopting the Fireshell Model. We consider e⁻e⁺-pair annihilation as the main channel for neutrino production. We compare the properties of the neutrino-flux with the characteristic photon-signal produced once the transparency condition is reached. We study the effects of flavor-oscillations and decoherence as neutrinos travel from the region near the black-hole (BH) event-horizon outwards. We consider the source to be in thermal equilibrium, and calculate energy distribution functions for electrons and neutrinos. To compute the effects of decoherence we use a Gaussian model. In this scenario the emitted electron-neutrinos transform into pointer states consisting of 67.8% electron-neutrinos and 32.2% as a combination of mu and tau neutrinos. We found that decoherence plays an important role in the evolution of the neutrino wave packet, leading to the detected pointer states on Earth.
format Articulo
Articulo
author Penacchioni, Ana Virginia
Civitarese, Enrique Osvaldo
author_facet Penacchioni, Ana Virginia
Civitarese, Enrique Osvaldo
author_sort Penacchioni, Ana Virginia
title Neutrino oscillations and decoherence in short-GRB progenitors
title_short Neutrino oscillations and decoherence in short-GRB progenitors
title_full Neutrino oscillations and decoherence in short-GRB progenitors
title_fullStr Neutrino oscillations and decoherence in short-GRB progenitors
title_full_unstemmed Neutrino oscillations and decoherence in short-GRB progenitors
title_sort neutrino oscillations and decoherence in short-grb progenitors
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/125234
work_keys_str_mv AT penacchionianavirginia neutrinooscillationsanddecoherenceinshortgrbprogenitors
AT civitareseenriqueosvaldo neutrinooscillationsanddecoherenceinshortgrbprogenitors
bdutipo_str Repositorios
_version_ 1764820451423420418

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