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American Physical Society, Physical Review D, Particles and fields, 5(67), 2003

DOI: 10.1103/physrevd.67.054011

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PolarizedJ/ψproduction fromBmesons at the Fermilab Tevatron

Journal article published in 2003 by V. Krey ORCID, K. R. S. Balaji
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

In the framework of nonrelativistic quantum chromodynamics and the parton model, we estimate, in detail, the production cross section for polarized J/ψ from B meson decays. In order to contrast with data, we also take into account additional J/ψ production due to the decay of excited charmonium states. We calculate the helicity parameter α and, as an application, we study our results for the Fermilab Tevatron. This is in contrast with the earlier studies which were performed for prompt J/ψ production from pp̅ collisions. Our estimates are, for J/ψ from B decays, αJ/ψ=-0.04±0.06 and, for B decays to ψ′, αψ′=-0.03±0.07. These results have been evaluated in the J/ψ transverse momentum interval 10GeV<~kT<~30GeV. In the limit of the color singlet model, α shows a direct dependence on the Peterson parameter, thereby reflecting the dynamics of the b quark hadronization. With run II of the Tevatron, it is expected that the fits for α will improve by about a factor of 50, leading to better limits on the matrix elements.