Polarisation effects in the central exclusive $χ_c$ production and the $J/ψ$ angular distributions

Details Polarisation effects in the central exclusive $χ_c$ production and the $J/ψ$ angular distributions Polarisation effects in the central exclusive $χ_c$ production and the $J/ψ$ angular distributions

2010-08-25

arxiv.org/abs/1008.4325v2

Phys.Rev.D83:074017,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 8 figures, discrepancies with Durham group results clarified, numerics corrected, overall presentation and conclusio

Scientific paper

10.1103/PhysRevD.83.074017

We discuss exclusive elastic double diffractive axial-vector $\chi_c(1^+)$ and tensor $\chi_c(2^+)$ mesons production for different meson polarisations in proton-(anti)proton collisions at the Tevatron energy. The amplitude for the process is derived within the $k_t$-factorisation approach using unintegrated gluon distributions (UGDFs). Differential cross sections for different $\chi_c$ polarisations are calculated. Angular distributions of $J/\psi$ meson from the radiative $\chi_c(1^+,2^+)$ decays are derived. Prospects for experimental selection of different spin states of $\chi_c$ mesons are discussed.

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