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Title: Statistical sensitivity on right-handed currents in presence of eV scale sterile neutrinos with KATRIN

Abstract

The KATRIN experiment aims to determine the absolute neutrino mass by measuring the endpoint region of the tritium β-spectrum. As a large-scale experiment with a sharp energy resolution, high source luminosity and low background it may also be capable of testing certain theories of neutrino interactions beyond the standard model (SM). An example of a non-SM interaction are right-handed currents mediated by right-handed W bosons in the left-right symmetric model (LRSM). In this extension of the SM, an additional SU(2){sub R} symmetry in the high-energy limit is introduced, which naturally includes sterile neutrinos and predicts the seesaw mechanism. In tritium β decay, this leads to an additional term from interference between left- and right-handed interactions, which enhances or suppresses certain regions near the endpoint of the beta spectrum. In this work, the sensitivity of KATRIN to right-handed currents is estimated for the scenario of a light sterile neutrino with a mass of some eV. This analysis has been performed with a Bayesian analysis using Markov Chain Monte Carlo (MCMC). The simulations show that, in principle, KATRIN will be able to set sterile neutrino mass-dependent limits on the interference strength. The sensitivity is significantly increased if the Q value of themore » β decay can be sufficiently constrained. However, the sensitivity is not high enough to improve current upper limits from right-handed W boson searches at the LHC.« less

Authors:
;  [1]; ;  [2]; ;  [3];  [4]
  1. Institute for Nuclear Physics, University of Münster, Wilhelm Klemm-Str. 9, 41849 Münster (Germany)
  2. Institute for Nuclear Physics, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe (Germany)
  3. Institute of Experimental Nuclear Physics, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe (Germany)
  4. Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C (Denmark)
Publication Date:
OSTI Identifier:
22676170
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 06; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BETA DECAY; BETA SPECTRA; CERN LHC; ENERGY RESOLUTION; INTERFERENCE; LUMINOSITY; MARKOV PROCESS; MASS; MONTE CARLO METHOD; Q-VALUE; SENSITIVITY; SIMULATION; STANDARD MODEL; STERILE NEUTRINOS; SU-2 GROUPS; SYMMETRY; VISIBLE RADIATION; W MINUS BOSONS; W PLUS BOSONS

Citation Formats

Steinbrink, Nicholas M.N., Weinheimer, Christian, Glück, Ferenc, Valerius, Kathrin, Heizmann, Florian, Kleesiek, Marco, and Hannestad, Steen, E-mail: n.steinbrink@uni-muenster.de, E-mail: ferenc.glueck@kit.edu, E-mail: florian.heizmann@kit.edu, E-mail: marco.kleesiek@kit.edu, E-mail: kathrin.valerius@kit.edu, E-mail: weinheimer@uni-muenster.de, E-mail: steen@phys.au.dk. Statistical sensitivity on right-handed currents in presence of eV scale sterile neutrinos with KATRIN. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/06/015.
Steinbrink, Nicholas M.N., Weinheimer, Christian, Glück, Ferenc, Valerius, Kathrin, Heizmann, Florian, Kleesiek, Marco, & Hannestad, Steen, E-mail: n.steinbrink@uni-muenster.de, E-mail: ferenc.glueck@kit.edu, E-mail: florian.heizmann@kit.edu, E-mail: marco.kleesiek@kit.edu, E-mail: kathrin.valerius@kit.edu, E-mail: weinheimer@uni-muenster.de, E-mail: steen@phys.au.dk. Statistical sensitivity on right-handed currents in presence of eV scale sterile neutrinos with KATRIN. United States. doi:10.1088/1475-7516/2017/06/015.
Steinbrink, Nicholas M.N., Weinheimer, Christian, Glück, Ferenc, Valerius, Kathrin, Heizmann, Florian, Kleesiek, Marco, and Hannestad, Steen, E-mail: n.steinbrink@uni-muenster.de, E-mail: ferenc.glueck@kit.edu, E-mail: florian.heizmann@kit.edu, E-mail: marco.kleesiek@kit.edu, E-mail: kathrin.valerius@kit.edu, E-mail: weinheimer@uni-muenster.de, E-mail: steen@phys.au.dk. Thu . "Statistical sensitivity on right-handed currents in presence of eV scale sterile neutrinos with KATRIN". United States. doi:10.1088/1475-7516/2017/06/015.
@article{osti_22676170,
title = {Statistical sensitivity on right-handed currents in presence of eV scale sterile neutrinos with KATRIN},
author = {Steinbrink, Nicholas M.N. and Weinheimer, Christian and Glück, Ferenc and Valerius, Kathrin and Heizmann, Florian and Kleesiek, Marco and Hannestad, Steen, E-mail: n.steinbrink@uni-muenster.de, E-mail: ferenc.glueck@kit.edu, E-mail: florian.heizmann@kit.edu, E-mail: marco.kleesiek@kit.edu, E-mail: kathrin.valerius@kit.edu, E-mail: weinheimer@uni-muenster.de, E-mail: steen@phys.au.dk},
abstractNote = {The KATRIN experiment aims to determine the absolute neutrino mass by measuring the endpoint region of the tritium β-spectrum. As a large-scale experiment with a sharp energy resolution, high source luminosity and low background it may also be capable of testing certain theories of neutrino interactions beyond the standard model (SM). An example of a non-SM interaction are right-handed currents mediated by right-handed W bosons in the left-right symmetric model (LRSM). In this extension of the SM, an additional SU(2){sub R} symmetry in the high-energy limit is introduced, which naturally includes sterile neutrinos and predicts the seesaw mechanism. In tritium β decay, this leads to an additional term from interference between left- and right-handed interactions, which enhances or suppresses certain regions near the endpoint of the beta spectrum. In this work, the sensitivity of KATRIN to right-handed currents is estimated for the scenario of a light sterile neutrino with a mass of some eV. This analysis has been performed with a Bayesian analysis using Markov Chain Monte Carlo (MCMC). The simulations show that, in principle, KATRIN will be able to set sterile neutrino mass-dependent limits on the interference strength. The sensitivity is significantly increased if the Q value of the β decay can be sufficiently constrained. However, the sensitivity is not high enough to improve current upper limits from right-handed W boson searches at the LHC.},
doi = {10.1088/1475-7516/2017/06/015},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 06,
volume = 2017,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}