{chi}{sub {ital c}2}{r_arrow}{rho}{rho} and the {rho} polarization in massless perturbative QCD: How to test the distribution amplitudes
- Dipartimento di Fisica Teorica, Universita di Torino and INFN, Sezione di Torino, Via P. Giuria 1, I--10125 Torino (Italy)
- Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, via Ada Negri 18, I--09127 Cagliari (Italy)
We compute the helicity density matrix of {rho} vector mesons produced in the two-body decays of polarized {chi}{sub {ital c}2}{close_quote}s in the framework of massless perturbative QCD. The {chi}{sub {ital c}2}{close_quote}s are either exclusively or inclusively produced in {ital p{bar p}} or {ital pp} 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 us to discriminate between different proposed models. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 284089
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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