Upsilonium polarization as a touchstone in understanding the proton dynamics in QCD

Details Upsilonium polarization as a touchstone in understanding the proton dynamics in QCD Upsilonium polarization as a touchstone in understanding the proton dynamics in QCD

2007-07-02

arxiv.org/abs/0707.0253v2

JETP Lett.86:435-438,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 2 figures

Scientific paper

10.1134/S0021364007190010

In the framework of the k_t-factorization approach, the production of $\Upsilon mesons at the Fermilab Tevatron and CERN LHC is considered, and the predictions on the spin alignment parameter $\alpha$ 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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