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VOLUME 86 | ISSUE 7 | PAGE 499
Upsilonium polarization as a touchstone in understanding the parton dynamics in QCD
S. P. Baranov, N. P. Zotov* 1)

P.N.Lebedev Institute of Physics RAS, 119991 Moscow, Russia
*D.V.Skobeltzyn Institute of Nuclear Physics, 119991 Moscow, Russia

PACS: 12.38.Bx, 13.85.Ni, 14.40.Gx
In the framework of the kt-factorization approach, the production of Υ mesons at the Fermilab Tevatron and CERN LHC is considered, and the predictions on the spin alignment parameter α are presented. We argue that measuring the polarization of quarkonium states can serve as a crucial test discriminating two competing theoretical approaches to parton dynamics in QCD.

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