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

Ellis, J.; Fujii, H.; Kharzeev, D.

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

Authors

Ellis, J.

Fujii, H.

Kharzeev, D.

Description

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 $γ\sim 36^{\circ}$, corresponding to near-maximal mixing of the glueball and $\bar{s}s$ components.
7 pages, LaTeX