{chi}{sub {ital c}2}{r_arrow}{rho}{rho} and the {rho} polarization in massless perturbative QCD: How to test the distribution amplitudes

Journal Article · Wed May 01 00:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.5314· OSTI ID:284089

Anselmino, M ^[1]; Murgia, F ^[2]

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1. Dipartimento di Fisica Teorica, Universita di Torino and INFN, Sezione di Torino, Via P. Giuria 1, I--10125 Torino (Italy)
2. 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, Vol. 53, Issue 9; Other Information: PBD: May 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
RHO-770 MESONS
POLARIZATION
XI PARTICLES
WEAK HADRONIC DECAY
QUANTUM CHROMODYNAMICS
POLARIZED BEAMS
DENSITY MATRIX
HELICITY
PERTURBATION THEORY
PROTON-ANTIPROTON INTERACTIONS
PROTON-PROTON INTERACTIONS
GLUONS
ANNIHILATION
MASSLESS PARTICLES
DISTRIBUTION