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Title: Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos

Abstract

Here, we discuss the possibility to explain the anomalies in short-baseline neutrino oscillation experiments in terms of sterile neutrinos. We work in a 3 + 1 framework and pay special attention to recent new data from reactor experiments, IceCube and MINOS+. We find that results from the DANSS and NEOS reactor experiments support the sterile neutrino explanation of the reactor anomaly, based on an analysis that relies solely on the relative comparison of measured reactor spectra. Global data from the ν$$_{e}$$ disappearance channel favour sterile neutrino oscillations at the 3σ level with Δm$$_{41}^{2}$$ ≈1.3 eV$$^{2}$$ and |U$$_{e4}$$| ≈ 0.1, even without any assumptions on predicted reactor fluxes. In contrast, the anomalies in the ν$$_{e}$$ appearance channel (dominated by LSND) are in strong tension with improved bounds on ν$$_{μ}$$ disappearance, mostly driven by MINOS+ and IceCube. Under the sterile neutrino oscillation hypothesis, the p-value for those data sets being consistent is less than 2.6 × 10$$^{-6}$$. Therefore, an explanation of the LSND anomaly in terms of sterile neutrino oscillations in the 3 + 1 scenario is excluded at the 4.7σ level. This result is robust with respect to variations in the analysis and used data, in particular it depends neither on the theoretically predicted reactor neutrino fluxes, nor on constraints from any single experiment. Irrespective of the anomalies, we provide updated constraints on the allowed mixing strengths |U$$_{α4}$$| (α = e, μ, τ ) of active neutrinos with a fourth neutrino mass state in the eV range.

Authors:
 [1];  [2];  [3];  [4];  [5];  [5];  [2]
  1. Johannes Gutenberg Univ. Mainz, Mainz (Germany)
  2. Karlsruher Institut fur Technologie (KIT), Eggenstein-Leopoldshafen (Germany)
  3. Johannes Gutenberg Univ. Mainz, Mainz (Germany); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  4. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  5. Instituto de Fisica Teorica UAM/CSIC, Madrid (Spain)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1436714
Report Number(s):
arXiv:1803.10661; MITP-18-023; IFT-UAM-CSIC-18-033; MITP/18-023; FERMILAB-PUB-18-086-T; IFT-UAM/CSIC-18-033
Journal ID: ISSN 1029-8479; 1664547; TRN: US1900222
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 8; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Neutrino Physics; Beyond Standard Model

Citation Formats

Dentler, Mona, Hernández-Cabezudo, Álvaro, Kopp, Joachim, Machado, Pedro, Maltoni, Michele, Martinez-Soler, Ivan, and Schwetz, Thomas. Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos. United States: N. p., 2018. Web. doi:10.1007/JHEP08(2018)010.
Dentler, Mona, Hernández-Cabezudo, Álvaro, Kopp, Joachim, Machado, Pedro, Maltoni, Michele, Martinez-Soler, Ivan, & Schwetz, Thomas. Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos. United States. doi:10.1007/JHEP08(2018)010.
Dentler, Mona, Hernández-Cabezudo, Álvaro, Kopp, Joachim, Machado, Pedro, Maltoni, Michele, Martinez-Soler, Ivan, and Schwetz, Thomas. Fri . "Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos". United States. doi:10.1007/JHEP08(2018)010. https://www.osti.gov/servlets/purl/1436714.
@article{osti_1436714,
title = {Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos},
author = {Dentler, Mona and Hernández-Cabezudo, Álvaro and Kopp, Joachim and Machado, Pedro and Maltoni, Michele and Martinez-Soler, Ivan and Schwetz, Thomas},
abstractNote = {Here, we discuss the possibility to explain the anomalies in short-baseline neutrino oscillation experiments in terms of sterile neutrinos. We work in a 3 + 1 framework and pay special attention to recent new data from reactor experiments, IceCube and MINOS+. We find that results from the DANSS and NEOS reactor experiments support the sterile neutrino explanation of the reactor anomaly, based on an analysis that relies solely on the relative comparison of measured reactor spectra. Global data from the ν$_{e}$ disappearance channel favour sterile neutrino oscillations at the 3σ level with Δm$_{41}^{2}$ ≈1.3 eV$^{2}$ and |U$_{e4}$| ≈ 0.1, even without any assumptions on predicted reactor fluxes. In contrast, the anomalies in the ν$_{e}$ appearance channel (dominated by LSND) are in strong tension with improved bounds on ν$_{μ}$ disappearance, mostly driven by MINOS+ and IceCube. Under the sterile neutrino oscillation hypothesis, the p-value for those data sets being consistent is less than 2.6 × 10$^{-6}$. Therefore, an explanation of the LSND anomaly in terms of sterile neutrino oscillations in the 3 + 1 scenario is excluded at the 4.7σ level. This result is robust with respect to variations in the analysis and used data, in particular it depends neither on the theoretically predicted reactor neutrino fluxes, nor on constraints from any single experiment. Irrespective of the anomalies, we provide updated constraints on the allowed mixing strengths |U$_{α4}$| (α = e, μ, τ ) of active neutrinos with a fourth neutrino mass state in the eV range.},
doi = {10.1007/JHEP08(2018)010},
journal = {Journal of High Energy Physics (Online)},
number = 8,
volume = 2018,
place = {United States},
year = {2018},
month = {8}
}

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