Unquenching the Scalar Glueball

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.1998· OSTI ID:560713

Boglione, M; Pennington, M R ^[1]; Boglione, M ^[2]

---

1. Centre for Particle Theory, University of Durham, Durham DH13LE (United Kingdom)
2. Dipartimento di Fisica Teorica dell`Universita di Torino and I.N.F.N., Sezione di Torino, via P.Giuria 1, I-10125 Turin (Italy)

Computations in the quenched approximation on the lattice predict the lightest glueball to be a scalar in the 1.5{endash}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. Modeling this nonperturbative interaction reveals that, if the pure glue state has a width to two pseudoscalars of {approximately}100 MeV as predicted on the lattice, the resulting hadron has a width to these channels of only {approximately}30 MeV with a large {eta}{eta} component. Experimental results need to be reanalyzed in light of these predictions to decide if either the f{sub 0}(1500) or an f{sub 0}(1710) coincides with this dressed glueball. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 560713
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COUPLING
GLUEBALLS
LATTICE FIELD THEORY
MASS
PARTICLE DECAY
SCALARS
WIDTH