Eur. Phys. J. C 21, 531-543 (2001)
DOI: 10.1007/s100520100748
Scalar glueball-
mixing above 1 GeV
and implications for lattice QCD
F.E. Close1 and A. Kirk2
1 Department of Theoretical Physics, University of Oxford, 1 Keble Rd, Oxford, OX1 3NP, UK
2 School of Physics and Astronomy, Birmingham University, Birmingham, B15 2TT, UK
(Received: 19 March 2001 / Published online: 17 August 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )
Abstract
Lattice QCD predictions have motivated several recent studies of the
mixing between the predicted
JPC = 0++
glueball and a nonet in the
GeV region.
We show that results from
apparently different approaches have some common features,
explain why this is so and abstract general conclusions.
We place particular emphasis on the flavour dependent
constraints imposed by decays of the f0(1370), f0(1500)
and f0(1700) to all pairs of pseudoscalar mesons.
From these results we identify a systematic correlation
between glueball mass, mixing, and flavour symmetry breaking and conclude
that
the glueball may be rather lighter than some quenched lattice
QCD computations have suggested. We identify experimental
tests that can determine the dynamics of a glueball in this mass
region and discuss quantitatively the feasibility of
decoding glueball-
mixing.
© Società Italiana di Fisica, Springer-Verlag 2001
