First measurement of θ[subscript 13] from delayed neutron capture on hydrogen in the Double Chooz experiment
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Conrad_First measurement.pdf
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Author(s)
Conrad, Janet Marie
Spitz, Joshua B.
Jones, Christopher LaDon
Terao, Kazuhiro
Winslow, Lindley
Alternative Title
First measurement of θ13 from delayed neutron capture on hydrogen in the Double Chooz experiment
Date Issued
April 2013
Journal
Physics Letters B
Publisher
Elsevier
Citation
Abe, Y. et al. “First Measurement of θ13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment.” Physics Letters B 723.1–3 (2013): 66–70. © 2013 Elsevier B.V.
Version
Final published version
Abstract
The Double Chooz experiment has determined the value of the neutrino oscillation parameter θ[subscript 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[superscript 2] 2θ[subscript 13] = 0.097 ± 0.034 (stat.) ± 0.034 (syst.), excluding the no-oscillation hypothesis at 2.0σ. This result is consistent with previous measurements of sin[superscript 2] 2θ[subscript 13].
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2013.04.050
