Zhi-Guo He

Next-to-leading-order QCD corrections to $S$- and $P$-wave heavy quarkonium decay to $l^{+}l^{-} \gamma$

In this work, we comprehensively study the total and differential decay widths of the radiative Dalitz decays $H \to l^+l^-\gamma$ up to QCD next-to-leading order (NLO) accuracy within the framework of NRQCD factorization. Our calculation includes the decays of $S$-wave states ($\eta_c, \eta_b$) and the $P$-wave triple...