| This analysis searches for a new type of rare decay of the charmed mesons, which would provide direct evidence for the presence of Fock states inside hadrons.;We use 586pb--1 of e+ e-- collisions at the Cornell Electron Storage Ring (CESR), at s = 4.17 GeV, recorded with the Cleo-c detector.;A limit on the branching ratio Ds → o enu is found, at 0.231% (95% C.L.). |
