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Endpoint Structure in Beta Decay from Coherent Weak-Interaction of the Neutrino

1996/11/25 by J. I. Collar, Collar, J. I.
Physics and Astronomy · #Astrophysics (astro-ph) #Atomic Physics (physics.atom-ph) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #astro-ph #hep-ph #nucl-ex #physics.atom-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9611420

Small paragraph added with estimate of {\it quantitative} effect of the potential on experimental data. References to recent relevant publications added. LaTeX, 3 pages, 2 enbedded eps figs

openalex publication_date 1996/11/25 · arxiv created 1999/07/09 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Recent tritium beta decay experiments yield unphysical negative best-fit values for the square of the neutrino mass. An unidentified bump-like excess of counts few eV below the endpoint in the electron energy spectrum has been tentatively recognized as the source of this anomaly. It is shown that the repulsive potential acting on the emitted antineutrino and originating in its coherent weak-interaction with the daughter atom may effectively account for this excess.

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