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  Sterile Neutrino Constraints from the STEREO Experiment with 66 days of Reactor-on Data

Almazán, H., Sanchez, P. d. A., Bernard, L., Blanchet, A., Bonhomme, A., Buck, C., et al. (2018). Sterile Neutrino Constraints from the STEREO Experiment with 66 days of Reactor-on Data. Physical Review Letters, 121(16): 161801. doi:10.1103/PhysRevLett.121.161801.

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 Creators:
Almazán, Helena1, Author           
Sanchez, P. del Amo, Author
Bernard, L., Author
Blanchet, A., Author
Bonhomme, A., Author
Buck, Christian1, Author           
Favier, J., Author
Haser, Julia1, Author           
Hélaine, V., Author
Kandzia, F., Author
Kox, S., Author
Lamblin, J., Author
Letourneau, A., Author
Lhuillier, D., Author
Lindner, Manfred1, Author           
Manzanillas, L., Author
Materna, T., Author
Minotti, A., Author
Montanet, F., Author
Pessard, H., Author
Real, J. -S., AuthorRoca, C., AuthorSalagnac, T., AuthorSchoppmann, Stefan1, Author           Sergeyeva, V., AuthorSoldner, T., AuthorStutz, A., AuthorZsoldos, S., Author more..
Affiliations:
1Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549              

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Free keywords: High Energy Physics - Experiment, hep-ex
 Abstract: The reactor antineutrino anomaly might be explained by the oscillation of
reactor antineutrinos toward a sterile neutrino of eV mass. In order to explore
this hypothesis, the STEREO experiment measures the antineutrino energy
spectrum in six different detector cells covering baselines between 9 and 11 m
from the compact core of the ILL research reactor. In this Letter, results from
66 days of reactor turned on and 138 days of reactor turned off are reported. A
novel method to extract the antineutrino rates has been developed based on the
distribution of the pulse shape discrimination parameter. The test of a new
oscillation toward a sterile neutrino is performed by comparing ratios of
cells, independent of absolute normalization and of the prediction of the
reactor spectrum. The results are found to be compatible with the null
oscillation hypothesis and the best fit of the reactor antineutrino anomaly is
excluded at 97.5\% C.L.

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 Dates: 2018-10-18
 Publication Status: Published online
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 121 (16) Sequence Number: 161801 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1