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First measurement of ?13 from delayed neutron capture on hydrogen in the Double Chooz experiment

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posted on 2023-06-10, 01:46 authored by Y Abe, C Aberle, J C dos Anjos, J C Barriere, M Bergevin, A Bernstein, Thiago Sogo BezerraThiago Sogo Bezerra, L Bezrukhov, E Blucher, N S Bowden, C Buck, J Busenitz, A Cabrera, E Caden, L Camilleri, others
The Double Chooz experiment has determined the value of the neutrino oscillation parameter ?13 from an analysis of inverse beta decay interactions with neutron capture on hydrogen. This analysis uses a three times larger fiducial volume than the standard Double Chooz assessment, which is restricted to a region doped with gadolinium (Gd), yielding an exposure of 113.1 GW-ton-years. The data sample used in this analysis is distinct from that of the Gd analysis, and the systematic uncertainties are also largely independent, with some exceptions, such as the reactor neutrino flux prediction. A combined rate- and energy-dependent fit finds sin22?13=0.097±0.034 (stat.)±0.034 (syst.), excluding the no-oscillation hypothesis at 2.0. This result is consistent with previous measurements of sin22?13.

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Publication status

  • Published

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  • Published version

Journal

Physics Letters B

ISSN

0370-2693

Publisher

Elsevier

Issue

1-3

Volume

723

Page range

66-70

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2021-11-16

First Open Access (FOA) Date

2021-11-16

First Compliant Deposit (FCD) Date

2021-11-12

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