DOI 10.1007/s100520000444
Absence of gluonic components in axial and tensor mesons
W.S. Carvalho1 - A.S. de Castro2 - A.C.B. Antunes1
1 Instituto de Física,
Universidade Federal do Rio de Janeiro,
C.P. 68528, Ilha do Fundão,
21945-970 Rio de Janeiro, RJ, Brazil
2 UNESP, Campus de Guaratinguetá, DFQ,
C.P. 205,
12500-000 Guaratinguetá, SP, Brazil
Received: 12 November 1999 / Revised version: 27 April 2000 /
Published online: 9 August 2000 - © Springer-Verlag 2000
Abstract
A quarkonium-gluonium mixing scheme previously developed to
describe the
characteristic of the pseudoscalar mesons is applied to axial
and tensor
mesons. The parameters of the model are determined by fitting
the
eigenvalues of a mass matrix. The corresponding eigenvectors
give the
proportion of light quarks, strange quarks and glueball in each
meson.
However, the predictions of the model for the branching ratios and
electromagnetic decays are incompatible with the experimental
results. These
results suggest the absence of gluonic components in the states
of axial and
tensor isosinglet mesons analyzed here.
Copyright Società Italiana di Fisica, Springer-Verlag 2000
