Mixing of meson, hybrid, and glueball states
- 1 October 2001
- journal article
- Published by Pleiades Publishing Ltd in Physics of Atomic Nuclei
- Vol. 64 (10) , 1876-1886
- https://doi.org/10.1134/1.1414936
Abstract
An effective QCD Hamiltonian is constructed with the aid of the background perturbation theory and relativistic Feynman-Schwinger path integrals for Green's functions. The resulting spectrum displays mass gaps of about 1 GeV when an additional valence gluon is added to the bound state. The mixing of meson, hybrid, and glueball states is defined in two ways—through generalized Green's functions and through a modified Feynman diagram technique—giving similar answers. Results for mixing matrix elements are numerically not large (around 0.1 GeV) and agree with earlier analytic estimates and lattice simulations.Keywords
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