On the origin of the reactor antineutrino anomalies in light of a new summation model with parameterized $\beta^{-}$ transitions

We investigate the possible origins of the norm and shape reactor antineutrino anomalies in the framework of a summation model (SM) where $\beta^{-}$ transitions are simulated by a phenomenological Gamow-Teller $\beta$-decay strength model. The general trends of the discrepancies to the Huber-Muelle...

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Bibliographic Details
Published in:Physical review letters 2023, Vol.130 (2)
Main Authors: Letourneau, A., Savu, V., Lhuillier, D., Lasserre, Th, Materna, Th, Mention, G., Mougeot, X., Onillon, A., Perisse, L., Vivier, M.
Format: Article
Language:English
Subjects:
High Energy Physics - Experiment
High Energy Physics - Phenomenology
Physics
Online Access:Get full text
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Summary:We investigate the possible origins of the norm and shape reactor antineutrino anomalies in the framework of a summation model (SM) where $\beta^{-}$ transitions are simulated by a phenomenological Gamow-Teller $\beta$-decay strength model. The general trends of the discrepancies to the Huber-Mueller model on the antineutrino side can be reproduced both in norm and shape. From the exact electron-antineutrino correspondence of the SM model, we predict similar distortions in the electron spectra, suggesting that biases on the reference fission-electron spectra could be at the origin of the anomalies.
ISSN:0031-9007
1079-7114