First constraints on the $L_{\hat{I}}¼-L_{\ddot{I}}„$ explanation of the muon $g-2$ anomaly from NA64-$e$ at CERN

Yu. M. Andreev, A. Antonov, D. Banerjee +58

The inclusion of an additional $U(1)$ gauge $L_{\hat{I}}¼-L_{\ddot{I}}„$ symmetry would release the tension between the measured and the predicted value of the anomalous muon magnetic moment: this…