Testing the hypothesis of vector X17 boson by D meson, Charmonium, and $\varphi$ meson decays

Fei-Fan Lee, Lam Thi Thuc Uyen, Guey-Lin Lin

The recent ATOMKI experiments provided evidence pointing towards the existence of an X17 boson in the anomalous nuclear transitions of Beryllium-8, Helium-4, and Carbon-12. In this…