25-29 August 2014
Schloss Waldthausen, Mainz, Germany
Europe/Berlin timezone

Precision Results on θ_13 from Daya Bay

26 Aug 2014, 16:35
20m
Schloss Waldthausen, Mainz, Germany

Schloss Waldthausen, Mainz, Germany

Heavy Quarks & Leptons Neutrino Physics

Speaker

Jim Napolitano (Temple University)

Description

The Daya Bay Reactor Neutrino Experiment measures the neutrino mixing angle θ_13 with high sensitivity, using functionally identical detectors at appropriate distances from the cores of a nuclear power plant. We have analyzed 217 days of data with six detectors, and 404 days with the full complement of eight detectors, obtaining a sample of over two million ν ̄ep → e+n events. Combining rate and spectral shape information, we find sin^2 2θ_13 = 0.084 ± 0.005 and ∆m^2 = (2.44+0.10-0.11) × 10^−3 eV^2 for events where the neutron captures on gadolinium. Also, using the six detector data set and a rate analysis based on np capture, we find sin^2 2θ_13 = 0.083 ± 0.018. We will present details of these results, including a discussion of backgrounds and systematic uncertainties.

Primary author

Jim Napolitano (Temple University)

Presentation Materials