Unquenching the scalar glueball
Mar, 199712 pages
Published in:
- Phys.Rev.Lett. 79 (1997) 1998-2001
e-Print:
- hep-ph/9703257 [hep-ph]
Report number:
- DTP-97-02,
- DPT-97-02
Citations per year
Abstract: (arXiv)
Computations in the quenched approximation on the lattice predict the lightest glueball to be a scalar in the 1.5-1.8 GeV region. Here we calculate the dynamical effect the coupling to two pseudoscalars has on the mass, width and decay pattern of such a scalar glueball. These hadronic interactions allow mixing with the scalar nonet, which is largely fixed by the well-established K_0^*(1430). This non-perturbative mixing means that, if the pure gluestate has a width to two pseudoscalar channels of ~100 MeV as predicted on the lattice, the resulting hadron has a width to these channels of only ~30 MeV with a large eta-eta component. Experimental results need to be reanalyzed in the light of these predictions to decide if either the f_0(1500) or an f_0(1710) coincides with this dressed glueball.- lattice field theory
- approximation: quenching
- glueball: mass
- glueball: decay modes
- glueball: width
- glueball: coupling
- quark antiquark: bound state
- interference: effect
- numerical calculations: interpretation of experiments
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