J/Psi production, chi polarization and color fluctuations

  • 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 part of these cross sections which dominates at psNN 20 GeV at the Cern Super Proton Synchrotron (SPS) and becomes a correction at psNN 6 TeV at the CERN Large Hadron Collider (LHC). J/psi production at the CERN SPS is well described by hard QCD, when the larger absorption cross sections of the states predicted by QCD are taken into account. We predict an A-dependent polarization of the states. The expansion of small wave packets is discussed.

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Author:Lars GerlandGND, Leonid Frankfurt, Mark StrikmanORCiDGND, Horst StöckerORCiDGND, Walter GreinerGND
Document Type:Preprint
Date of Publication (online):2005/12/14
Year of first Publication:1998
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/12/14
Tag:Hadronenbeschleuniger; LHC; Quanten-Chromodynamik; SPS; Teilchenbeschleuniger
LHC; Large Hadron Collider; Quantum Chromodynamic; SPS; Super Proton Synchrotron
Source:Phys.Rev.Lett.81:762-765,1998 , http://arxiv.org/abs/nucl-th/9803034 Version 2
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht