The Glueball in a Chiral Linear Sigma Model with Vector Mesons

Details The Glueball in a Chiral Linear Sigma Model with Vector Mesons The Glueball in a Chiral Linear Sigma Model with Vector Mesons

2011-03-16

arxiv.org/abs/1103.3238v1

Phys. Rev. D 84, 054007 (2011)

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages

Scientific paper

10.1103/PhysRevD.84.054007

We present a two-flavour linear sigma model with global chiral symmetry and (axial-)vector mesons as well as an additional glueball degree of freedom. We study the structure of the well-established scalar resonances f0(1370) and f0(1500): by a fit to experimentally known decay widths we find that f0(1370) is predominantly a \bar{q}q state and f0(1500) is predominantly a glueball state. The overall phenomenology of these two resonances can be well described. Other assignments for our mixed quarkonium-glueball states are also tested, but turn out to be in worse agreement with the phenomenology. As a by-product of our analysis, the gluon condensate is determined.

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