Identification of a Scalar Glueball
- 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, Vol. 101, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.101.252002; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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