Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 108: Neutrinophysik 9 (sterile Neutrinos)

T 108.2: Gruppenbericht

Donnerstag, 30. März 2017, 17:05–17:25, VSH 118

Short Distance Neutrino Oscillations with SOX — •Stefan Weinz for the Borexino collaboration — Uni Mainz

The Borexino detector has convincingly shown its outstanding performances in the low energy regime and is therefore an ideal tool to perform a state of the art source-based experiment for testing the longstanding hypothesis of a fourth sterile neutrino species with ≈2 eV mass, as suggested by several anomalies accumulated over the past three decades in source-, reactor-, and accelerator-based experiments. The SOX project aims at successively deploying two intense radioactive sources, made of Cerium (antineutrino) and Chromium (neutrino), respectively, in a dedicated pit located beneath the detector. The existence of such an ≈2 eV sterile neutrino would then show up as an unambiguous spatial and energy distortion in the count rate of neutrinos interacting within the active detector volume. This article reports on the latest developments about the first phase of the SOX experiment, namely CeSOX, and gives a realistic projection of CeSOX sensitivity to light sterile neutrinos in a simple (3+1) model.