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Search for signatures of sterile neutrinos with Double Chooz
Name
10052_2021_Article_9459.pdf
Size
1.98 MB
Format
Adobe PDF
Checksum (MD5)
fdd2ec6a0c2334ef0756b9735829d403
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 29, 2021
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.
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Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-021-09459-0
