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arXiv · 2205.14954

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

A. Letourneau·V. Savu·D. Lhuillier·Th. Lasserre·Th. Materna·G. Mention·X. Mougeot·A. Onillon·L. Perisse·M. Vivier
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Abstract

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.

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A. Letourneau, V. Savu, D. Lhuillier, Th. Lasserre, Th. Materna, G. Mention, X. Mougeot, A. Onillon, L. Perisse, M. Vivier. 2022-05-30. On the origin of the reactor antineutrino anomalies in light of a new summation model with parameterized $\beta^{-}$ transitions. https://doi.org/10.1103/physrevlett.130.021801

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