Using nuclei to probe hadronization in QCD |
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| Institution: | 1. Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94305, USA;2. Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA;3. Physics Department, Columbia University, New York, NY 10027, USA;1. Physikalisch-Technische Bundesanstalt, D-38116 Braunschweig, Germany;2. Technische Universität Braunschweig, D-38106 Braunschweig, Germany;3. Helmholtz-Institute Jena, D-07743 Jena, Germany;4. Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany;1. University of Bologna, Italy;2. INFN Bologna, Italy;1. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna 141980, Moscow region, Russia;2. Fachbereich Physik, Universität Wuppertal, D-42097 Wuppertal, Germany;3. Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany;1. University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland;2. Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland;3. Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, E-15782 Galicia, Spain;1. University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014 Jyvaskyla, Finland;2. Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland;3. Instituto Galego de Física de Altas Enerxías IGFAE, Universidade de Santiago de Compostela, E-15782 Galicia-Spain |
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| Abstract: | The behavior of quasi-exclusive and inclusive ϱ and J/ψ photoproduction, electroproduction and hadroproduction in nuclei are discussed for small and large p⊥. In particular we argue that J/ψ production in ion-ion collisions is likely to be suppressed relative to the background lepton pair production, independent of whether or not a QCD plasma is formed. We point out that previous extractions of the J/ψ inelastic cross section do not actually measure the cross section for the interaction of physical J/ψ's with nucleons. |
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