J/psi plus dijet associated production in two-photon collisions

Abstract

We study the production of a J/psi meson in association with one or two jets in gamma gamma collisions concentrating on the direct-photon contribution, which is expected to be dominant for large J/psi-meson transverse momentum and/or large dijet invariant mass. We work at leading order in the factorization formalism of nonrelativistic QCD and include all relevant colour-octet processes. We present distributions in J/psi-meson transverse momentum and rapidity appropriate for CERN LEP2, a future e^+e^- linear collider, and a possible gamma gamma collider mode of the latter. In the case of the e^+e^- linear collider, we assume the beamstrahlung spectrum appropriate for DESY TESLA.

25 pages (Latex), 12 figures (Postscript). Version to appear in Nucl. Phys. B

References in corpus (1)

• Power counting and effective field theory for charmonium

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