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arXiv · 1705.09434

Reactor antineutrino shoulder explained by energy scale nonlinearities?

G. Mention·M. Vivier·J. Gaffiot·T. Lasserre·A. Letourneau·T. Materna
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Abstract

The Daya Bay, Double Chooz and RENO experiments recently observed a significant distortion in their detected reactor antineutrino spectra, being at odds with the current predictions. Although such a result suggests to revisit the current reactor antineutrino spectra modeling, an alternative scenario, which could potentially explain this anomaly, is explored in this letter. Using an appropriate statistical method, a study of the Daya Bay experiment energy scale is performed. While still being in agreement with the {\gamma} calibration data and Boron 12 measured spectrum, it is shown that a O(1%) deviation of the energy scale reproduces the distortion observed in the Daya Bay spectrum, remaining within the quoted calibration uncertainties. Potential origins of such a deviation, which challenge the energy calibration of these detectors, are finally discussed.

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G. Mention, M. Vivier, J. Gaffiot, T. Lasserre, A. Letourneau, T. Materna. 2017-05-26. Reactor antineutrino shoulder explained by energy scale nonlinearities?. https://doi.org/10.1016/j.physletb.2017.08.035

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