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Contribution Poster sterile

Poster (not participating in poster prize competition)

Oscillation fits of the STEREO experiment



Primary authors

Authorship annotation

for the STEREO collaboration

Session and Location

Monday Session, Poster Wall #145 (Hölderlin-Room)

Abstract content

STEREO is a coarsely segmented liquid scintillator calorimeter studying anti-neutrinos produced by the compact nuclear reactor core of the Institut Laue-Langevin at Grenoble (France). The experiment has been designed to test the light sterile neutrino explanation of the Reactor Antineutrino Anomaly (RAA) by comparing the neutrino energy spectra recorded by its six detector cells. The cells are located between 9 and 11 m away from the centre of the reactor core. Using data collected since 2016, the STEREO experiment excludes a significant fraction of the RAA favoured region in the $\Delta m_{41}^2-\sin^2(2\theta_{ee})$ parameter space. In this poster we go through the details of the formalism and the statistical treatment used to extract these exclusion contours. In particular, we discuss how the ratios between the spectra detected in the 6 cells allow an analysis which is mostly insensitive to information on the reactor antineutrino spectrum.

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