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Scalar Glueball-Quarkonium Mixing and the Structure of the QCD Vacuum

We use Ward identities of broken scale invariance to infer the amount of scalar glueball--$\bar{q}q$ meson mixing from the ratio of quark and gluon condensates in the QCD vacuum. Assuming dominance by a single scalar state, as suggested by a phase-shift analysis, we find a mixing angle $\gamma \sim...

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Detalles Bibliográficos
Autores principales: Ellis, John R., Fujii, Hirotsugu, Kharzeev, Dmitri
Lenguaje:eng
Publicado: 1999
Materias:
Acceso en línea:http://cds.cern.ch/record/399515
Descripción
Sumario:We use Ward identities of broken scale invariance to infer the amount of scalar glueball--$\bar{q}q$ meson mixing from the ratio of quark and gluon condensates in the QCD vacuum. Assuming dominance by a single scalar state, as suggested by a phase-shift analysis, we find a mixing angle $\gamma \sim 36^{\circ}$, corresponding to near-maximal mixing of the glueball and