Identification of a Scalar Glueball

Journal Article · Fri Dec 19 04:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.252002· OSTI ID:21180024

Albaladejo, M; Oller, J A ^[1]

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1. Departamento de Fisica, Universidad de Murcia, E-30071 Murcia (Spain)

We perform a coupled channel study of the meson-meson S waves with isospin (I) 0 and 1/2 up to 2 GeV. A new approach is derived that allows one to include the many channels {pi}{pi}, KK, {eta}{eta}, {sigma}{sigma}, {eta}{eta}{sup '}, {eta}{sup '}{eta}{sup '}, {rho}{rho}, {omega}{omega}, {omega}{phi}, {phi}{phi}, a{sub 1}{pi}, and {pi}*{pi} with still few free parameters. It follows that coupled channel dynamics is strong and cannot be neglected in order to study resonance properties in the region 1.4-1.6 GeV. All the resonances with masses below 2 GeV and I=0 and 1/2 are generated. We identify the f{sub 0}(1710) and an important contribution to the f{sub 0}(1500) as an unmixed glueball. This is based on an accurate agreement of our results with predictions of lattice QCD and the chiral suppression of the coupling of a scalar glueball to qq. Another pole, mainly corresponding to the f{sub 0}(1370), is a pure octet state.

• OSTI ID: 21180024
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRALITY
COUPLED CHANNEL THEORY
ETA MESONS
GEV RANGE 01-10
GLUEBALLS
ISOSPIN
KAONS
OMEGA PARTICLES
PAIR PRODUCTION
PHI MESONS
PIONS
QUANTUM CHROMODYNAMICS
RESONANCE
S WAVES
SIGMA PARTICLES