dorsal/arxiv
View SchemaJ/\Psi production, $\chi$ polarization and Color Fluctuations
| Authors | L. Gerland, L. Frankfurt, M. Strikman, H. Stöcker, W. Greiner |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9803034 |
| URL | https://arxiv.org/abs/nucl-th/9803034 |
| DOI | 10.1103/PhysRevLett.81.762 |
| Journal | Phys.Rev.Lett. 81 (1998) 762-765 |
Abstract
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 $\sqrt{s_{NN}}\approx 20$ GeV at the Cern Super Proton Synchrotron (SPS) and becomes a correction at $\sqrt{s_{NN}}\approx 6$ TeV at the CERN Large Hadron Collider (LHC). $\J$ production at the CERN SPS is well described by hard QCD, when the larger absorption cross sections of the $\chi$ states predicted by QCD are taken into account. We predict an $A$-dependent polarization of the $\chi$ states. The expansion of small wave packets is discussed.
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"abstract": "The hard contributions to the heavy quarkonium-nucleon cross sections are\ncalculated based on the QCD factorization theorem and the nonrelativistic\nquarkonium model. We evaluate the nonperturbative part of these cross sections\nwhich dominates at $\\sqrt{s_{NN}}\\approx 20$ GeV at the Cern Super Proton\nSynchrotron (SPS) and becomes a correction at $\\sqrt{s_{NN}}\\approx 6$ TeV at\nthe CERN Large Hadron Collider (LHC). $\\J$ production at the CERN SPS is well\ndescribed by hard QCD, when the larger absorption cross sections of the $\\chi$\nstates predicted by QCD are taken into account. We predict an $A$-dependent\npolarization of the $\\chi$ states. The expansion of small wave packets is\ndiscussed.",
"arxiv_id": "nucl-th/9803034",
"authors": [
"L. Gerland",
"L. Frankfurt",
"M. Strikman",
"H. St\u00f6cker",
"W. Greiner"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevLett.81.762",
"journal_ref": "Phys.Rev.Lett. 81 (1998) 762-765",
"title": "J/\\Psi production, $\\chi$ polarization and Color Fluctuations",
"url": "https://arxiv.org/abs/nucl-th/9803034"
},
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