Search for a Higgs boson decaying into gamma*gamma to mu+mu-gamma with dilepton mass below 20 GeV in pp collisions at sqrt-s = 8 TeV

A search for a Higgs boson decaying into two photons, one of which has an internal conversion into a muon pair, is described. The analysis is performed using proton-proton collision data recorded by the CMS detector at the LHC. The events, collected at a center-of-mass energy of 8\,TeV, correspond to an integrated luminosity of 19.7\,fb$^{-1}$. Events are selected which have an opposite-sign muon pair and a high transverse momentum photon. No excess above background has been found in the 120--150\,GeV mass range and the first limits have been derived for the Higgs boson production cross section times the ${\rm H}\to\gamma^*\gamma\to\mu\mu\gamma$ branching fraction for dimuon invariant mass less than 20\,GeV. The observed limit for a Higgs boson of mass 125\,GeV is about ten times the standard model cross section times branching fraction.