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Charmonium production at ELFE energies

Paul Hoyer
(
- Nordita
)

Feb, 1997

19 pages

Part of Prospects of hadron and quark physics with electromagnetic probes. Proceedings, 2nd ELFE Workshop on Hadronic Physics, Saint Malo, France, September 23-27, 1996

Contribution to:

2nd ELFE Workshop

e-Print:

hep-ph/9702385 [hep-ph]

Report number:

NORDITA-97-8-P

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Abstract:

I discuss issues related to charmonium production, in view of physics possibilities at a 15 ... 30 GeV continuous beam electron facility. High energy photo- and hadroproduction of heavy quarkonia presents several challenges to QCD models concerning cross sections, polarization and nuclear target dependence. Theoretical approaches based on color evaporation as well as on color singlet and color octet mechanisms have met with both successes and failures, indicating that charmonium production is a sensitive probe of color dynamics. Experiments close to charm kinematic threshold will be sensitive also to target substructure since only unusual, compact target configurations contribute. In particular, subthreshold production on nuclei should identify nuclear hot spots of high energy density. At low energies, charmonium will form inside the target nucleus, allowing a determination of c cbar bound state interactions in nuclear matter.

talk: St. Malo 1996/09/22
electron p: exclusive reaction
electron p: inclusive reaction
exchange: one-photon
photon p: exclusive reaction
photon p: inclusive reaction
quarkonium: photoproduction
charmonium
J/psi(3100)
psi(3685)

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Figures(0)

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