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Title: Oscillation properties of active and sterile neutrinos and neutrino anomalies at short distances

Abstract

A generalized phenomenological (3 + 2 + 1) model featuring three active and three sterile neutrinos that is intended for calculating oscillation properties of neutrinos for the case of a normal active neutrino mass hierarchy and a large splitting between the mass of one sterile neutrino and the masses of the other two sterile neutrinos is considered. A new parametrization and a specific form of the general mixing matrix are proposed for active and sterile neutrinos with allowance for possible CP violation in the lepton sector, and test values are chosen for the neutrino masses and mixing parameters. The probabilities for the transitions between different neutrino flavors are calculated, and graphs representing the probabilities for the disappearance of muon neutrinos/antineutrinos and the appearance of electron neutrinos/antineutrinos in a beam of muon neutrinos/antineutrinos versus the distance from the neutrino source for various values of admissible model parameters at neutrino energies not higher than 50 MeV, as well as versus the ratio of this distance to the neutrino energy, are plotted. It is shown that the short-distance accelerator anomaly in neutrino data (LNSD anomaly) can be explained in the case of a specific mixing matrix for active and sterile neutrinos (which belongsmore » to the a{sub 2} type) at the chosen parameter values. The same applies to the short-distance reactor and gallium anomalies. The theoretical results obtained in the present study can be used to interpret and predict the results of ground-based neutrino experiments aimed at searches for sterile neutrinos, as well as to analyze some astrophysical observational data.« less

Authors:
; ;  [1]
  1. National Research Center Kurchatov Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22612619
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 79; Journal Issue: 5; Other Information: Copyright (c) 2016 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTINEUTRINOS; CP INVARIANCE; DISTANCE; ELECTRON NEUTRINOS; FLAVOR MODEL; GALLIUM; MEV RANGE 10-100; MUON NEUTRINOS; NEUTRINO BEAMS; NEUTRINO OSCILLATION; REST MASS; STERILE NEUTRINOS

Citation Formats

Khruschov, V. V., E-mail: khruschov-vv@nrcki.ru, Fomichev, S. V., E-mail: fomichev-sv@nrcki.ru, and Titov, O. A., E-mail: titov-oa@nrcki.ru. Oscillation properties of active and sterile neutrinos and neutrino anomalies at short distances. United States: N. p., 2016. Web. doi:10.1134/S1063778816050124.
Khruschov, V. V., E-mail: khruschov-vv@nrcki.ru, Fomichev, S. V., E-mail: fomichev-sv@nrcki.ru, & Titov, O. A., E-mail: titov-oa@nrcki.ru. Oscillation properties of active and sterile neutrinos and neutrino anomalies at short distances. United States. doi:10.1134/S1063778816050124.
Khruschov, V. V., E-mail: khruschov-vv@nrcki.ru, Fomichev, S. V., E-mail: fomichev-sv@nrcki.ru, and Titov, O. A., E-mail: titov-oa@nrcki.ru. Thu . "Oscillation properties of active and sterile neutrinos and neutrino anomalies at short distances". United States. doi:10.1134/S1063778816050124.
@article{osti_22612619,
title = {Oscillation properties of active and sterile neutrinos and neutrino anomalies at short distances},
author = {Khruschov, V. V., E-mail: khruschov-vv@nrcki.ru and Fomichev, S. V., E-mail: fomichev-sv@nrcki.ru and Titov, O. A., E-mail: titov-oa@nrcki.ru},
abstractNote = {A generalized phenomenological (3 + 2 + 1) model featuring three active and three sterile neutrinos that is intended for calculating oscillation properties of neutrinos for the case of a normal active neutrino mass hierarchy and a large splitting between the mass of one sterile neutrino and the masses of the other two sterile neutrinos is considered. A new parametrization and a specific form of the general mixing matrix are proposed for active and sterile neutrinos with allowance for possible CP violation in the lepton sector, and test values are chosen for the neutrino masses and mixing parameters. The probabilities for the transitions between different neutrino flavors are calculated, and graphs representing the probabilities for the disappearance of muon neutrinos/antineutrinos and the appearance of electron neutrinos/antineutrinos in a beam of muon neutrinos/antineutrinos versus the distance from the neutrino source for various values of admissible model parameters at neutrino energies not higher than 50 MeV, as well as versus the ratio of this distance to the neutrino energy, are plotted. It is shown that the short-distance accelerator anomaly in neutrino data (LNSD anomaly) can be explained in the case of a specific mixing matrix for active and sterile neutrinos (which belongs to the a{sub 2} type) at the chosen parameter values. The same applies to the short-distance reactor and gallium anomalies. The theoretical results obtained in the present study can be used to interpret and predict the results of ground-based neutrino experiments aimed at searches for sterile neutrinos, as well as to analyze some astrophysical observational data.},
doi = {10.1134/S1063778816050124},
journal = {Physics of Atomic Nuclei},
number = 5,
volume = 79,
place = {United States},
year = {Thu Sep 15 00:00:00 EDT 2016},
month = {Thu Sep 15 00:00:00 EDT 2016}
}