J/ψProduction in Direct and Resolved Photon Collisions

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The production of J/Psi mesons in photon photon collisions allows for a test of factorization in color-octet processes as predicted by NRQCD and observed at the Tevatron. We calculate the cross sections for J/Psi production with direct and resolved photons, including also the feed-down from chi_{cJ} and Psi' decays. Our NRQCD predictions are nicely confirmed by recent data from the DELPHI collaboration at CERN LEP2.
Talk presented at the QCD Moriond 2003 conference. 4 pages, 3 postscript figures

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/42437

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-ph/0304271
 http://arxiv.org/abs/hep-ph/0304271

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arXiv