6533b827fe1ef96bd12867fd
RESEARCH PRODUCT
The gallium anomaly revisited
Jouni SuhonenPraveen C. SrivastavaJoel KostensaloC. Giuntisubject
gallium anomalyNuclear and High Energy PhysicsNuclear Theorychemistry.chemical_elementFluxFOS: Physical sciencesneutrino-nucleus interactions01 natural sciencesNuclear physicsNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)0103 physical sciencesGallium010306 general physicsWave functionMixing (physics)Physics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyNuclear shell modelcharged-current cross-sectionslcsh:QC1-999High Energy Physics - Phenomenologynuclear shell modelchemistryHigh Energy Physics::ExperimentAnomaly (physics)NeutrinoGALLEXydinfysiikkalcsh:Physicsdescription
The gallium anomaly, i.e. the missing electron-neutrino flux from $^{37}$Ar and $^{51}$Cr 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 ν¯e disappearance due to small active-sterile neutrino mixing obtained from the combined analysis of the data of the NEOS and DANSS reactor experiments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-26 | Physics Letters B |