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SUMMARY:The search for eV sterile neutrinos with the STEREO experiment
DTSTART;VALUE=DATE-TIME:20200228T070000Z
DTEND;VALUE=DATE-TIME:20200228T072000Z
DTSTAMP;VALUE=DATE-TIME:20260606T144519Z
UID:indico-contribution-1467@indico.tlabs.ac.za
DESCRIPTION:Speakers: Helena Almazan (Max-Planck-Institut fuer Kernphysik)
 \nIn the last decade\, two unsolved anomalies have appeared from the study
  of reactor neutrinos: one related to the neutrino spectral shape\, and an
 other to the absolute neutrino flux. The second one\, known as the Reactor
  Antineutrino Anomaly\, presents a deficit in the observed flux compared t
 o the expected one that could point to the existence of a light sterile ne
 utrino in the eV range participating in the oscillation phenomena.\nThe ST
 EREO experiment is a short baseline reactor antineutrino experiment trying
  to test the existence of those sterile neutrinos. This experiment\, takin
 g data since the end of 2016\, measures the antineutrino energy spectrum f
 rom the compact core of the research reactor of the Institut Laue-Langevin
  (Grenoble\, France) operated with highly enriched U-235 fuel. Covering ba
 selines between 9 and 11m with a segmented neutrino target\, STEREO can st
 udy the rate of neutrino interactions and compare it among cells to test o
 scillation hypotheses at different distances from the source. STEREO can a
 lso measure the absolute neutrino flux and spectral shape emitted from a p
 ure U-235 core.\nNeutrino data from 179 (235) days of reactor turned on (o
 ff) have been analyzed\, showing compatibility with the null oscillation h
 ypothesis and rejecting the best fit point of the Reactor Antineutrino Ano
 maly at 99.8% C.L. In this talk\, these results together with the latest i
 mprovements in the description of the detector models and the background t
 reatment are reported\, providing a crucial input in the search for steril
 e neutrinos.\n\nhttps://indico.tlabs.ac.za/event/85/contributions/1467/
LOCATION:Parallel Venue
URL:https://indico.tlabs.ac.za/event/85/contributions/1467/
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