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Search for signatures of sterile neutrinos with Double Chooz
Journal article   Open access   Peer reviewed

Search for signatures of sterile neutrinos with Double Chooz

H. Almazan, J. C. dos Anjos, S. Appel, J. C. Barriere, Bekman, T. J. C. Bezerra, L. Bezrukov, E. Blucher, T. Brugiere, C. Buck, …
The European physical journal. C, Particles and fields, v 81(8), pp 775-14
01 Aug 2021
DOI: https://doi.org/10.1140/epjc/s10052-021-09459-0
url
https://doi.org/10.1140/epjc/s10052-021-09459-0View
Published, Version of Record (VoR)CC BY V4.0,  Open

Abstract

Physical Sciences Physics Physics, Particles & Fields Science & Technology
We present a search for signatures of neutrino mixing of electron anti-neutrinos with additional hypothetical sterile neutrino flavors using the Double Chooz experiment. The search is based on data from 5 years of operation of Double Chooz, including 2 years in the two-detector configuration. The analysis is based on a profile likelihood, i.e. comparing the data to the model prediction of disappearance in a data-to-data comparison of the two respective detectors. The analysis is optimized for a model of three active and one sterile neutrino. It is sensitive in the typical mass range 5 x 10(-3) eV(2) less than or similar to Delta m(41)(2) less than or similar to 3 x 10(-1) eV(2) for mixing angles downto sin(2) 2 theta(14) greater than or similar to 0.02. No significant disappearance additionally to the conventional disappearance related to theta(13) is observed and correspondingly exclusion bounds on the sterile mixing parameter theta(14) as a function of Delta m(41)(2) are obtained.

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Physics, Particles & Fields
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