Search for Sub-Threshold J/psi Photoproduction

We present results from the recent Jefferson Lab experiment E03-008: ``Sub-threshold J/$\psi$ Photoproduction." A beam of 6 GeV electrons was impinged on a thick carbon target and lepton pairs were detected in two magnetic spectrometers in Hall C. The kinematics were sub-threshold to production from a free proton, so the experiment probed the short distance configuration in the nucleus, where one expects sensitivity to higher twist effects (such as three-gluon exchange), intrinsic charm contributions, and possible multi-quark resonances involving charmed quarks. An upper bound for the cross section near threshold will be presented.