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

Title: Short-baseline electron neutrino disappearance, tritium beta decay, and neutrinoless double-beta decay

Abstract

We consider the interpretation of the MiniBooNE low-energy anomaly and the gallium radioactive source experiments anomaly in terms of short-baseline electron neutrino disappearance in the framework of 3+1 four-neutrino mixing schemes. The separate fits of MiniBooNE and gallium data are highly compatible, with close best-fit values of the effective oscillation parameters {Delta}m{sup 2} and sin{sup 2}2{theta}. The combined fit gives {Delta}m{sup 2}(greater-or-similar sign)0.1 eV{sup 2} and 0.11(less-or-similar sign)sin{sup 2}2{theta}(less-or-similar sign)0.48 at 2{sigma}. We consider also the data of the Bugey and Chooz reactor antineutrino oscillation experiments and the limits on the effective electron antineutrino mass in {beta} decay obtained in the Mainz and Troitsk tritium experiments. The fit of the data of these experiments limits the value of sin{sup 2}2{theta} below 0.10 at 2{sigma}. Considering the tension between the neutrino MiniBooNE and gallium data and the antineutrino reactor and tritium data as a statistical fluctuation, we perform a combined fit which gives {Delta}m{sup 2}{approx_equal}2 eV and 0.01(less-or-similar sign)sin{sup 2}2{theta}(less-or-similar sign)0.13 at 2{sigma}. Assuming a hierarchy of masses m{sub 1}, m{sub 2}, m{sub 3}<<m{sub 4}, the predicted contributions of m{sub 4} to the effective neutrino masses in {beta} decay and neutrinoless double-{beta} decay are, respectively, between about 0.06 and 0.49 andmore » between about 0.003 and 0.07 eV at 2{sigma}. We also consider the possibility of reconciling the tension between the neutrino MiniBooNE and gallium data and the antineutrino reactor and tritium data with different mixings in the neutrino and antineutrino sectors. We find a 2.6{sigma} indication of a mixing angle asymmetry.« less

Authors:
;  [1]
  1. INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino (Italy)
Publication Date:
OSTI Identifier:
21467382
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 82; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.82.053005; (c) 2010 American Institute of Physics; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BETA DECAY; CHOOZ-A REACTOR; DOUBLE BETA DECAY; ELECTRON ANTINEUTRINOS; ELECTRON NEUTRINOS; FLUCTUATIONS; GALLIUM; MASS; OSCILLATIONS; RADIATION SOURCES; TRITIUM; WEINBERG ANGLE; ANTILEPTONS; ANTIMATTER; ANTINEUTRINOS; ANTIPARTICLES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY; BETA-MINUS DECAY RADIOISOTOPES; DECAY; ELEMENTARY PARTICLES; ELEMENTS; ENRICHED URANIUM REACTORS; FERMIONS; HYDROGEN ISOTOPES; ISOTOPES; LEPTONS; LIGHT NUCLEI; MASSLESS PARTICLES; MATTER; METALS; NEUTRINOS; NUCLEAR DECAY; NUCLEI; ODD-EVEN NUCLEI; POWER REACTORS; PWR TYPE REACTORS; RADIOISOTOPES; REACTORS; THERMAL REACTORS; VARIATIONS; WATER COOLED REACTORS; WATER MODERATED REACTORS; YEARS LIVING RADIOISOTOPES

Citation Formats

Giunti, Carlo, Laveder, Marco, and Dipartimento di Fisica G. Galilei, Universita di Padova, and INFN, Sezione di Padova, Via F. Marzolo 8, I-35131 Padova. Short-baseline electron neutrino disappearance, tritium beta decay, and neutrinoless double-beta decay. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.82.053005.
Giunti, Carlo, Laveder, Marco, & Dipartimento di Fisica G. Galilei, Universita di Padova, and INFN, Sezione di Padova, Via F. Marzolo 8, I-35131 Padova. Short-baseline electron neutrino disappearance, tritium beta decay, and neutrinoless double-beta decay. United States. doi:10.1103/PHYSREVD.82.053005.
Giunti, Carlo, Laveder, Marco, and Dipartimento di Fisica G. Galilei, Universita di Padova, and INFN, Sezione di Padova, Via F. Marzolo 8, I-35131 Padova. Wed . "Short-baseline electron neutrino disappearance, tritium beta decay, and neutrinoless double-beta decay". United States. doi:10.1103/PHYSREVD.82.053005.
@article{osti_21467382,
title = {Short-baseline electron neutrino disappearance, tritium beta decay, and neutrinoless double-beta decay},
author = {Giunti, Carlo and Laveder, Marco and Dipartimento di Fisica G. Galilei, Universita di Padova, and INFN, Sezione di Padova, Via F. Marzolo 8, I-35131 Padova},
abstractNote = {We consider the interpretation of the MiniBooNE low-energy anomaly and the gallium radioactive source experiments anomaly in terms of short-baseline electron neutrino disappearance in the framework of 3+1 four-neutrino mixing schemes. The separate fits of MiniBooNE and gallium data are highly compatible, with close best-fit values of the effective oscillation parameters {Delta}m{sup 2} and sin{sup 2}2{theta}. The combined fit gives {Delta}m{sup 2}(greater-or-similar sign)0.1 eV{sup 2} and 0.11(less-or-similar sign)sin{sup 2}2{theta}(less-or-similar sign)0.48 at 2{sigma}. We consider also the data of the Bugey and Chooz reactor antineutrino oscillation experiments and the limits on the effective electron antineutrino mass in {beta} decay obtained in the Mainz and Troitsk tritium experiments. The fit of the data of these experiments limits the value of sin{sup 2}2{theta} below 0.10 at 2{sigma}. Considering the tension between the neutrino MiniBooNE and gallium data and the antineutrino reactor and tritium data as a statistical fluctuation, we perform a combined fit which gives {Delta}m{sup 2}{approx_equal}2 eV and 0.01(less-or-similar sign)sin{sup 2}2{theta}(less-or-similar sign)0.13 at 2{sigma}. Assuming a hierarchy of masses m{sub 1}, m{sub 2}, m{sub 3}<<m{sub 4}, the predicted contributions of m{sub 4} to the effective neutrino masses in {beta} decay and neutrinoless double-{beta} decay are, respectively, between about 0.06 and 0.49 and between about 0.003 and 0.07 eV at 2{sigma}. We also consider the possibility of reconciling the tension between the neutrino MiniBooNE and gallium data and the antineutrino reactor and tritium data with different mixings in the neutrino and antineutrino sectors. We find a 2.6{sigma} indication of a mixing angle asymmetry.},
doi = {10.1103/PHYSREVD.82.053005},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 5,
volume = 82,
place = {United States},
year = {2010},
month = {9}
}