EXPERIMENTAL SEARCH FOR MUONIC PHOTONS

We report new limits on the production of muonic photons in the CERN n eutrino beam. The results are based on the analysis of neutrino produc tion of dimuons in the CHARM II detector. A 90% CL limit on the coupli ng constant of muonic photons, alpha(mu)/alpha( <(1.5 divided by 3.2)x 10(-6) is derived for a muon neutrino mass in the range m(nu mu) = (1 0(-20) divided by 10(5)) eV. This improves the limit obtained from a p recision measurement of the anomalous magnetic moment of the muon (g - 2)(mu) by a factor from 8 to 4. (C) 1998 Elsevier Science B.V. All ri ghts reserved.