A1 Journal article (refereed)
The gallium anomaly revisited (2019)


Kostensalo, J., Suhonen, J., Giunti, C., & Srivastava, P. C. (2019). The gallium anomaly revisited. Physics Letters B, 795, 542-547. https://doi.org/10.1016/j.physletb.2019.06.057


JYU authors or editors


Publication details

All authors or editors: Kostensalo, J.; Suhonen, J.; Giunti, C.; Srivastava, P. C.

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2019

Volume: 795

Pages range: 542-547

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2019.06.057

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67709

Web address of parallel published publication (pre-print): https://arxiv.org/abs/1906.10980


Abstract

The gallium anomaly, i.e. the missing electron-neutrino flux from 37Ar and 51Cr electron-capture decays as measured by the GALLEX and SAGE solar-neutrino detectors, has been among us already for about two decades. We present here a new estimate of the significance of this anomaly based on cross-section calculations using nuclear shell-model wave functions obtained by exploiting recently developed two-nucleon interactions. The gallium anomaly of the GALLEX and SAGE experiments is found to be smaller than that obtained in previous evaluations, decreasing the significance from 3.0σ to 2.3σ. This result is compatible with the recent indication in favor of short-baseline disappearance due to small active-sterile neutrino mixing obtained from the combined analysis of the data of the NEOS and DANSS reactor experiments.


Keywords: nuclear physics

Free keywords: gallium anomaly; charged-current cross-sections; nuclear shell model; neutrino-nucleus interactions


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Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 2


Last updated on 2021-20-09 at 15:53