$χ_{c2} \to ρρ$ and the $rho$ polarization in massless perturbative QCD: how to test the distribution amplitudes

Details $χ_{c2} \to ρρ$ and the $rho$ polarization in massless perturbative QCD: how to test the distribution amplitudes $χ_{c2} \to ρρ$ and the $rho$ polarization in massless perturbative QCD: how to test the distribution amplitudes

1995-10-05

arxiv.org/abs/hep-ph/9510231v1

Phys.Rev.D53:5314-5317,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages + 4 figures, REVTEX 3.0, figures appended as uuencoded, compressed postscript file

Scientific paper

10.1103/PhysRevD.53.5314

We compute the helicity density matrix of $\rho$ vector mesons produced in the two-body decays of polarized $\chi_{c2}$'s in the framework of massless perturbative QCD. The $\chi_{c2}$'s are either exclusively or inclusively produced in $p \, \bar p$ or $p \, p$ interactions, via quark-antiquark annihilation or gluon fusion. Our results show unambiguous significant differences depending on the choice of the $\rho$ distribution amplitudes and allow to discriminate between different proposed models.

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