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First measurement of theta(13) from delayed neutron capture on hydrogen in the Double Chooz experiment
Journal article   Open access

First measurement of theta(13) from delayed neutron capture on hydrogen in the Double Chooz experiment

Y. Abe, C. Aberle, J. C. dos Anjos, J. C. Barriere, M. Bergevin, A. Bernstein, T. J. C. Bezerra, L. Bezrukhovn, E. Blucher, N. S. Bowden, …
Physics letters. B, v 723(1-3), pp 66-70
10 Jun 2013
url
https://doi.org/10.1016/j.physletb.2013.04.050View
Published, Version of Record (VoR)CC BY V4.0 Open

Abstract

Astronomy & Astrophysics Physical Sciences Physics Physics, Nuclear Physics, Particles & Fields Science & Technology
The Double Chooz experiment has determined the value of the neutrino oscillation parameter theta(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 sin(2) 2 theta(13) = 0.097 +/- 0.034 (stat.) +/- 0.034 (syst.), excluding the no-oscillation hypothesis at 2.0 sigma. This result is consistent with previous measurements of sin(2) 2 theta(13). (c) 2013 Elsevier B.V. All rights reserved.

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Astronomy & Astrophysics
Physics, Nuclear
Physics, Particles & Fields
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