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Unifying aspects of polarization of vector mesons from hard production in DIS and at Tevatron | | N.N. Nikolaev
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8 Aug 2001 | | Journal: | Nucl.Phys. A699 (2002) 210-217 | | Subject: | hep-ph | | Affiliation: | Institut f. Kernphysik, Forschungszentrum Juelich, Germany and L.D. Landau Institute for Theoretical Physics,Chernogolovka, Russia | | Abstract: | Virtual photons have both the transverse and longitudinal polarization. In the inclusive DIS the impact of longitudinal photons, quantified by R=sigmaL/igmaT sim 0.2, is marginal, but in diffractive DIS with excitation of small mass hadronic states or exclusive diffraction into vector mesons, QCD predicts R >> 1 in agreement with the experiment. After a brief review of the modern status of QCD theory of diffractive vector meson production I argue that longitudinally polarized gluons give rise to a large longitudinal polarization of the prompt JPsi and Psiprim observed at the Tevatron. | | Source: | arXiv, hep-ph/0108075 | | Services: | Forum | Review | PDF | Favorites | |
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