The Atomki anomalies and the X17

par Claudio Toni (Lapth)

jeudi 14 nov. 2024, 11:00 → 12:00 Europe/Paris

Auditorium (LAPTh)

In view of the experimental anomalies observed by the Atomki collaboration, we critically re-examine the possible theoretical interpretation of them in terms of a new BSM boson X with mass ∼ 17 MeV. Employing a low-energy effective field theory, we estimate the range of values of the nucleon couplings to the new light state in order to match the experimental observations. Our conclusions identify the axial vector state as the most promising candidate, while other spin/parity assignments seem disfavored for a combined explanation.