Abstract
The potentials used in the description of heavy quarkonium by the Schrödinger equation do not take into account nonlinear effects. A procedure for the calculation of nonlinear contributions in perturbation theory is proposed. This procedure involves the adiabatic (Born-Oppenheimer) approximation of the field theory with heavy fermions interacting with a boson field by the theory of a boson field with a quasistatic source. The ground-state energy of the approximate theory is calculated perturbatively with the Gell-Mann Low formula. It is shown by an explicit calculation that nonlinear contributions in QCD are not negligible (as they are in QED).
Original language | English |
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Pages (from-to) | 1377-1391 |
Number of pages | 15 |
Journal | Physical Review D |
Volume | 30 |
Issue number | 6 |
DOIs | |
State | Published - 1 Jan 1984 |