New anomaly observed in ${}^{12}$C supports the existence and the vector character of the hypothetical X17 boson

A. J. Krasznahorkay, A. Krasznahorkay, M. Begala +8

Employing the ${}^{11}$B(p,$\gamma$)${}^{12}$C nuclear reaction, the angular correlation of $e^{+}{e}^{-}$ pairs was investigated in the angular range of $40^{\circ }\Theta \le 175^{\circ }$ for five differ…