The significance of the Gallium Anomaly, from the BEST, GALLEX, and SAGE radioactive source experiments, is quantified using different theoretical calculations of the neutrino detection cross section, and its explanation due to neutrino oscillations is compared with the bounds from the analyses of reactor rate and spectral ratio data, β-decay data, and solar neutrino data. In the 3+1 active-sterile neutrino mixing scheme, the Gallium Anomaly is in strong tension with the individual and combined bounds of these data sets. In the combined scenario with all available data, the parameter goodness of fit is below 0.042%, corresponding to a severe tension of 4-5σ, or stronger. Therefore, we conclude that one should pursue other possible solutions beyond short-baseline oscillations for the Gallium Anomaly. We also present a new global fit of νe and νe disappearance data, showing that there is a 2.6-3.3σ preference in favor of short-baseline oscillations, which is driven by an updated analysis of reactor spectral ratio data. Contents I. Introduction 1 II. The Gallium Anomaly 2 III. The reactor rates constraints 4 IV. Short-baseline reactor spectral ratios 5 V. Combined short-baseline reactor spectral ratios and rates 6 VI. The KATRIN limit 8 VII. Combination of short-baseline reactor data and Tritium constraints 12 VIII. The solar neutrino bound 13 IX. Global ν e and νe disappearance analysis 15 X. Summary and conclusions 17 References 19
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.