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

Title: Constraining absolute neutrino masses via detection of galactic supernova neutrinos at JUNO

Abstract

A high-statistics measurement of the neutrinos from a galactic core-collapse supernova is extremely important for understanding the explosion mechanism, and studying the intrinsic properties of neutrinos themselves. In this paper, we explore the possibility to constrain the absolute scale of neutrino masses m{sub ν} via the detection of galactic supernova neutrinos at the Jiangmen Underground Neutrino Observatory (JUNO) with a 20 kiloton liquid-scintillator detector. In assumption of a nearly-degenerate neutrino mass spectrum and a normal mass ordering, the upper bound on the absolute neutrino mass is found to be m{sub ν}<(0.83±0.24) eV at the 95% confidence level for a typical galactic supernova at a distance of 10 kpc, where the mean value and standard deviation are shown to account for statistical fluctuations. For comparison, we find that the bound in the Super-Kamiokande experiment is m{sub ν}<(0.94±0.28) eV at the same confidence level. However, the upper bound will be relaxed when the model parameters characterizing the time structure of supernova neutrino fluxes are not exactly known, and when the neutrino mass ordering is inverted.

Authors:
; ; ;  [1]
  1. Institute of High Energy Physics, Chinese Academy of Sciences,Beijing 100049 (China)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22454552
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 05; Other Information: PUBLISHER-ID: JCAP05(2015)044; OAI: oai:repo.scoap3.org:10463; 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:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COSMIC NEUTRINOS; EV RANGE; MASS SPECTRA; NEUTRINO DETECTION; SCINTILLATION COUNTERS; STATISTICS; SUPERNOVAE; UNDERGROUND FACILITIES

Citation Formats

Lu, Jia-Shu, Cao, Jun, Li, Yu-Feng, and Zhou, Shun. Constraining absolute neutrino masses via detection of galactic supernova neutrinos at JUNO. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/05/044.
Lu, Jia-Shu, Cao, Jun, Li, Yu-Feng, & Zhou, Shun. Constraining absolute neutrino masses via detection of galactic supernova neutrinos at JUNO. United States. doi:10.1088/1475-7516/2015/05/044.
Lu, Jia-Shu, Cao, Jun, Li, Yu-Feng, and Zhou, Shun. 2015. "Constraining absolute neutrino masses via detection of galactic supernova neutrinos at JUNO". United States. doi:10.1088/1475-7516/2015/05/044.
@article{osti_22454552,
title = {Constraining absolute neutrino masses via detection of galactic supernova neutrinos at JUNO},
author = {Lu, Jia-Shu and Cao, Jun and Li, Yu-Feng and Zhou, Shun},
abstractNote = {A high-statistics measurement of the neutrinos from a galactic core-collapse supernova is extremely important for understanding the explosion mechanism, and studying the intrinsic properties of neutrinos themselves. In this paper, we explore the possibility to constrain the absolute scale of neutrino masses m{sub ν} via the detection of galactic supernova neutrinos at the Jiangmen Underground Neutrino Observatory (JUNO) with a 20 kiloton liquid-scintillator detector. In assumption of a nearly-degenerate neutrino mass spectrum and a normal mass ordering, the upper bound on the absolute neutrino mass is found to be m{sub ν}<(0.83±0.24) eV at the 95% confidence level for a typical galactic supernova at a distance of 10 kpc, where the mean value and standard deviation are shown to account for statistical fluctuations. For comparison, we find that the bound in the Super-Kamiokande experiment is m{sub ν}<(0.94±0.28) eV at the same confidence level. However, the upper bound will be relaxed when the model parameters characterizing the time structure of supernova neutrino fluxes are not exactly known, and when the neutrino mass ordering is inverted.},
doi = {10.1088/1475-7516/2015/05/044},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2015,
place = {United States},
year = 2015,
month = 5
}
  • A high-statistics measurement of the neutrinos from a galactic core-collapse supernova is extremely important for understanding the explosion mechanism, and studying the intrinsic properties of neutrinos themselves. In this paper, we explore the possibility to constrain the absolute scale of neutrino masses m{sub ν} via the detection of galactic supernova neutrinos at the Jiangmen Underground Neutrino Observatory (JUNO) with a 20 kiloton liquid-scintillator detector. In assumption of a nearly-degenerate neutrino mass spectrum and a normal mass ordering, the upper bound on the absolute neutrino mass is found to be m{sub ν} < (0.83 ± 0.24) eV at the 95% confidence level for a typical galacticmore » supernova at a distance of 10 kpc, where the mean value and standard deviation are shown to account for statistical fluctuations. For comparison, we find that the bound in the Super-Kamiokande experiment is m{sub ν} < (0.94 ± 0.28) eV at the same confidence level. However, the upper bound will be relaxed when the model parameters characterizing the time structure of supernova neutrino fluxes are not exactly known, and when the neutrino mass ordering is inverted.« less
  • Early black hole formation in a core-collapse supernova will abruptly truncate the neutrino fluxes. The sharp cutoff can be used to make model-independent time-of-flight neutrino mass tests. Assuming a neutrino luminosity of 10{sup 52} erg/s per flavor at cutoff and a distance of 10kpc, Super-Kamiokande can detect an electron neutrino mass as small as 1.8eV, and the proposed OMNIS detector can detect mu and tau neutrino masses as small as 6eV. We present the first technique with direct sensitivity to eV-scale mu and tau neutrino masses.
  • We discuss how proposed supernova neutrino detectors could measure masses for [nu][sub [mu]] or [nu][sub [tau]] neutrinos in the range of 15 to 50 eV. The range for measurable masses might be extended down to 5 eV, depending on our confidence in some of the predicted features of the supernova-neutrino-burst signal. We discuss the expected characteristics of supernova neutrino signals in proposed neutral-current-based detectors.
  • The possible outcomes of neutrino events at both Super-Kamiokande and SNO for a type-II supernova are analyzed considering the uncertainties in supernova neutrino spectra (temperature) at emission, which may complicate the interpretation of the observed events. With the input of parameters deduced from the current solar and atmospheric experiments, the consequences of direct-mass hierarchy m{sub {nu}}{sub {tau}}>>m{sub {nu}}{sub {mu}}>m{sub {nu}}{sub e} and inverted-mass hierarchy m{sub {nu}}{sub e}>m{sub {nu}}{sub {mu}}>>m{sub {nu}}{sub {tau}} are investigated. Even if the {nu} temperatures are not precisely known, we find that future experiments are likely to be able to separate the currently accepted solutions to themore » solar neutrino problem, large-angle Mikheyev-Smirnov-Wolfenstein (MSW), small-angle MSW, and the vacuum oscillation, as well as to distinguish between the direct and inverted mass hierarchies of the neutrinos. (c) 2000 The American Physical Society.« less