Next-to-leading order QCD corrections to fully charm tetraquark hadronic decay

We compute the next-to-leading order (NLO) QCD corrections to the light hadron decays of fully charm tetraquarks within the nonrelativistic QCD (NRQCD) factorization framework. The short-distance coefficients for the $gg$ and $q\bar{q}$ final states from fully charm tetraquarks are obtained analytically. The NLO corrections are found to be significant, altering the LO predictions by about $170\mathrm{\%}$ for the $0^{++}$ state and $30\mathrm{\%}$ for the $2^{++}$ state. The resulting ${\mathcal{R}}_{\mathrm{L}\mathrm{H}}$ values are of order ${10}^{-5}$ to ${10}^{-4}$ MeV, about three orders of magnitude larger than the diphoton channel, as expected for strong-interaction decays. Our results provide updated theoretical predictions for future experimental studies of fully charm tetraquark decays.