Quantum Chromodynamics Resolution of the ATOMKI Anomaly in ${}^4\mathrm{He}$ Nuclear Transitions

Valery Kubarovsky, Jennifer Rittenhouse West, Stanley J. Brodsky

Observations of anomalous angular correlations in electron-positron pairs produced from excited states of ${}^4$He, ${}^8$Be and ${}^{12}$C nuclei have been suggested as due to the c…