Search for Sub-threshold Photoproduction of J/Psi Mesons
P. Bosted, J. Dunne, C. A. Lee, P. Junnarkar, J. Arrington, R., Asaturyan, F. Benmokhtar, M.E. Christy, E. Chudakov, B. Clasie, S. H., Connell, M. M. Dalton, A. Daniel, D. Day, D. Dutta, R. Ent, N. Fomin, D., Gaskell, T. Horn, N. Kalantarians, C.E. Keppel, D.G. Meekins
TL;DR
This study searched for sub-threshold J/psi meson production using a photon beam on carbon, finding no events and setting limits on exotic production mechanisms.
Contribution
First experimental search for sub-threshold J/psi production with limits on exotic mechanisms using a photon beam on carbon.
Findings
No sub-threshold J/psi events observed
Results consistent with quasi-free production predictions
Limits placed on exotic enhancement mechanisms
Abstract
A search was made for sub-threshold production from a carbon target using a mixed real and quasi-real Bremsstrahlung photon beam with an endpoint energy of 5.76 GeV. No events were observed, which is consistent with predictions assuming quasi-free production. The results place limits on exotic mechanisms that strongly enhance quasi-free production.
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