Branching fraction measurements of $\eta$ and ${\eta }^{\prime }(958)$ anomalous decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1187

Branching fractions of $\eta$ and ${\eta }^{\prime }(958)$ anomalous decays are measured using $pp$ collision data at a center-of-mass energy of $\sqrt{s}=13\text{TeV}$ collected by the LHCb exper…