J/Ѱ production, χ polarization, and color fluctuations

L. Gerland, L. Frankfurt, M. Strikman, H. Stöcker, W. Greiner

Research output: Contribution to journalArticlepeer-review

70 Scopus citations


The hard contributions to the heavy quarkonium-nucleon cross sections are calculated based on the QCD factorization theorem and the nonrelativistic quarkonium model. We evaluate the nonperturbative cross sections which dominates at √sNN≈20 GeV at the CERN Super Proton Synchrotron (SPS) and becomes a correction at √sNN≈6 TeV at the CERN Large Hadron Collider. J/Ѱ production at the CERN SPS is well described by hard QCD, when the larger absorption cross sections of the χ states predicted by QCD are taken into account. We predict an A-dependent polarization of the χ states. The expansion of small wave packets is discussed.

Original languageEnglish (US)
Pages (from-to)762-765
Number of pages4
JournalPhysical review letters
Issue number4
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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