A search for pair production of new light bosons decaying into muons in proton-proton collisions at 13 TeV
Phys.Lett. B796 (2019) 131-154
The collaboration

Abstract (data abstract)
90% CL and 95% limits on the production cross section times branching fraction of Higgs boson decay to a pair of light bosons to four muons as function of the light boson mass.