A confining model for charmonium and new gauge-invariant field equations
Department of Physics, University of Massachusetts Dartmouth, 02747-2300, North Dartmouth, MA, USA
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Revised: 6 April 2014
Accepted: 23 April 2014
Published online: 3 June 2014
We discuss a confining model for charmonium in which the attractive force are derived from a new type of gauge field equation with a generalized SU3 gauge symmetry. The new gauge transformations involve non-integrable phase factors with vector gauge functions ω ω a (x). These transformations reduce to the usual SU3 gauge transformations in the special case ω μ a (x) = ∂ μ ξ a (x). Such a generalized gauge symmetry leads to the fourth-order equations for new gauge fields and to the linear confining potentials. The fourth-order field equation implies that the corresponding massless gauge boson has non-definite energy. However, the new gauge boson is permanently confined in a quark system by the linear potential. We use the empirical potentials of the Cornell group for charmonium to obtain the coupling strength f 2/(4π) ≈ 0.19 for the strong interaction. Such a confining model of quark dynamics could be compatible with perturbation. The model can be applied to other quark-antiquark systems.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2014