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First measurements in search for keV sterile neutrino in tritium beta-decay in the Troitsk nu-mass experiment

  • Fields, Particles, and Nuclei
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Abstract

We present the first results of precision measurements of tritium -decay spectrum in the electron energy range 16–18.6 keV by the Troitsk nu-mass experiment. The goal is to find distortions that may be caused by the existence of heavy sterile neutrinos. A signature would correspond to a kink in the spectrum with characteristic shape and end point shifted by the value of a heavy neutrino mass. We set new upper limits to the neutrino mixing matrix element U 2 e4 , which improve existing limits by a factor of 2 to 5 in the mass range of 0.1–2 keV.

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Authors and Affiliations

  1. Institute for Nuclear Research, Russian Academy of Sciences, Moscow, 117312, Russia

    J. N. Abdurashitov, A. I. Belesev, V. G. Chernov, E. V. Geraskin, A. A. Golubev, P. V. Grigorieva, N. A. Likhovid, A. A. Nozik, V. S. Pantuev, V. I. Parfenov, A. K. Skasyrskaya, I. I. Tkachev & S. V. Zadorozhny

  2. Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow region, 141700, Russia

    P. V. Grigorieva, G. A. Koroteev & A. A. Nozik

  3. Faculty of Physics, Novosibirsk State University, Novosibirsk, 630090, Russia

    I. I. Tkachev

Authors
  1. J. N. Abdurashitov
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  2. A. I. Belesev
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  3. V. G. Chernov
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  4. E. V. Geraskin
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  5. A. A. Golubev
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  6. P. V. Grigorieva
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  7. G. A. Koroteev
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  8. N. A. Likhovid
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  9. A. A. Nozik
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  10. V. S. Pantuev
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  11. V. I. Parfenov
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  12. A. K. Skasyrskaya
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  13. I. I. Tkachev
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  14. S. V. Zadorozhny
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Corresponding author

Correspondence to V. S. Pantuev.

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Abdurashitov, J.N., Belesev, A.I., Chernov, V.G. et al. First measurements in search for keV sterile neutrino in tritium beta-decay in the Troitsk nu-mass experiment. Jetp Lett. 105, 753–757 (2017). https://doi.org/10.1134/S0021364017120013

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  • DOI: https://doi.org/10.1134/S0021364017120013

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