ausblenden:
Schlagwörter:
High Energy Physics - Experiment, hep-ex
Zusammenfassung:
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 $\sin^2
2\theta_{13}=0.097\pm 0.034(stat.) \pm 0.034 (syst.)$, excluding the
no-oscillation hypothesis at 2.0 \sigma. This result is consistent with
previous measurements of $\sin^2 2\theta_{13}$.
