Vector and scalar mesons’ mixing from QCD sum rules

Abstract

Abstract We study q ¯ $$ \overline{q} $$ q-hybrid mixing for the light vector mesons and q ¯ $$ \overline{q} $$ q-glueball mixing for the light scalar mesons in Monte-Carlo based QCD Laplace sum rules. By calculating the two-point correlation function of a vector q ¯ $$ \overline{q} $$ γ μ q (scalar q ¯ $$ \overline{q} $$ q) current and a hybrid (glue- ball) current we are able to estimate the mass and the decay constants of the corresponding mixed “physical state” that couples to both currents. Our results do not support strong quark/gluonic mixing for either the 1 −− or the 0++ states.

Keywords

• QCD Phenomenology
• Phenomenological Models