Search for signatures of sterile neutrinos with Double Chooz
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10052_2021_Article_9459.pdf
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1.98 MB
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Author(s)
Abrahão, T.
Almazan, H.
dos Anjos, J. C.
Appel, S.
Barriere, J. C.
Bekman, I.
Bezerra, T. J. C.
Bezrukov, L.
Blucher, E.
Brugière, T.
Date Issued
August 2021
Journal
European Physical Journal C
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2021 Aug 29;81(8):775
Version
Final published version
Abstract
Abstract
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
$${5 \times 10^{-3}}\,\mathrm{eV}^2 \lesssim \varDelta m^2_{41} \lesssim {3 \times 10^{-1}}\,\mathrm{eV}^2 $$
5
×
10
-
3
eV
2
≲
Δ
m
41
2
≲
3
×
10
-
1
eV
2
for mixing angles down to
$$\sin ^2 2\theta _{14} \gtrsim {0.02} $$
sin
2
2
θ
14
≳
0.02
. No significant disappearance additionally to the conventional disappearance related to
$$\theta _{13} $$
θ
13
is observed and correspondingly exclusion bounds on the sterile mixing parameter
$$\theta _{14} $$
θ
14
as a function of
$$ \varDelta m^2_{41} $$
Δ
m
41
2
are obtained.
MIT Department
Massachusetts Institute of Technology. Sustainable Design Lab
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-021-09459-0
