The Glueball in a Chiral Linear Sigma Model with Vector Mesons
Mar, 2011
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Abstract: (arXiv)
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.Note:
- 8 pages
- 13.25.Jx
- 12.39.Fe
- 12.40.Yx
- 12.39.Mk
- glueball
- sigma model: linear
- flavor: 2
- gluon: condensation
- vector meson
- f0(1370)
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