J/Ψ production, χ polarization, and color fluctuations

被引:63
作者
Gerland, L
Frankfurt, L
Strikman, M
Stocker, H
Greiner, W
机构
[1] Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany
[2] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
[3] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
关键词
D O I
10.1103/PhysRevLett.81.762
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 root S-NN approximate to 20 GeV at the CERN Super Proton Synchrotron (SPS) and becomes a correction at root S-NN approximate to 6 TeV at the CERN Large Hadron Collider. J/Psi 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. [S0031-9007(98)06627-7].
引用
收藏
页码:762 / 765
页数:4
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