1. General Seminars

The X17 boson anomaly: status and prospects

by Enrico Nardi (Istituto Nazionale di Fisica Nucleare)

Aula Salvini (Laboratori Nazionali di Frascati)

Aula Salvini

Laboratori Nazionali di Frascati


Certain anomalies observed in the angular correlation spectra of electron/positron pairs produced in nuclear transitions of 8Be, 4He and 12C can be interpreted as the emission of a bosonic particle with a mass of 17 MeV, that promptly decays into e+e−. I review the current status of these anomalies, and some theoretical interpretation for the hypothetical new particle. I will also describe the experimental prospects for validating or disproving the X17 hypothesis, and I will stress the importance of verifying the nuclear physics experimental hint by means of a particle physics experiment.


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