First Measurement of θ13 From Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment
The Double Chooz experiment has determined the value of the neutrino oscillation parameter θ13 from an analysis of inverse beta decay interactions with neutron capture on hydrogen. The analysis presented here 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 sin22θ13 = 0.097±0.034(stat.)±0.034(syst.), excluding the no-oscillation hypothesis at 2.0σ. This result is consistent with previous measurements of sin22θ13.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Science and Security Consortium (NSSC)
- Contributing Organization:
- Double Chooz Collaboration
- Grant/Contract Number:
- NA0000979
- OSTI ID:
- 1454555
- Journal Information:
- Physics Letters B, Vol. 723, Issue 1-3; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Background-independent measurement of
Indication of Reactor Disappearance in the Double Chooz Experiment