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T: Fachverband Teilchenphysik

T 57: Neutrinophysik 5 (Reaktorneutrinos)

T 57.4: Vortrag

Dienstag, 28. März 2017, 17:35–17:50, VSH 07

Design and optimization of the Double Chooz final fit — Ilia Bekman, Denise Hellwig, Philipp Kampmann, Stefan Schoppmann, •Philipp Soldin, Achim Stahl, and Christopher Wiebusch — RWTH Aachen University - III. Physikalisches Institut B

The Double Chooz experiment is a reactor anti-neutrino experiment for the purpose of a precise measurement of the neutrino mixing angle θ₁₃. The experimental setup consists of two identical liquid scintillator detectors at an average baseline of about 400m and 1km to two reactor cores at the nuclear power plant in Chooz, France. The neutrinos are detected by measuring the signature of the inverse beta decay (IBD), which consists of a prompt positron signal and a delayed neutron capture signal. By performing a simultaneous likelihood fit and taking into account the detector neutrino rates, the energy spectral shape and all relevant backgrounds, the neutrino mixing angle θ₁₃ can be obtained. In this talk the method, design, performance and optimisation of such a likelihood fit are presented. Furthermore a crosscheck for the latest final fit results are shown.