Dresden 2013 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 100: Niederenergie-Neutrinophysik 2

T 100.2: Gruppenbericht

Montag, 4. März 2013, 17:05–17:25, WIL-A317

Alternative Approach for the Measurement of θ₁₃ Using Neutron Capture on Hydrogen in Double Chooz — •Sebastian Lucht — RWTH Aachen University, Germany, Aachen

Double Chooz is a reactor antineutrino experiment built to measure neutrino mixing angle θ₁₃. The experiment uses two detectors at different distances (400 m and 1 km) to precisely measure the disappearance of ν_e from the CHOOZ-B reactor cores. The neutrinos are detected by the inverse beta decay (IBD) signature which is a two-fold coincidence of a prompt positron followed by a delayed neutron capture on Gadolinium (Gd) or Hydrogen (H). All recently published results from reactor neutrino experiments are based on neutron captures on Gd. In Double Chooz an additional method based on captures on H has been developed. The H detection channel provides an independent data sample to cross-check the Gd analysis result. Furthermore, because of the different nature of the backgrounds and systematic uncertainties, a combination of the H and Gd analysis improves the measurement of θ₁₃. In this talk, the current results from the H analysis in Double Chooz are presented.