Gauge invariance and the choice of gauge for one-gluon-exchange corrections to quarkonium mass spectra
- 1 February 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 21 (3) , 845-849
- https://doi.org/10.1103/physrevd.21.845
Abstract
The gauge invariance of the bound-state energy correction due to one-gluon exchange between a quark and antiquark is demonstrated under the assumption that, in zeroth order, the bound state is described by a Bethe-Salpeter equation with an instantaneous and local interaction kernel, which does not include one-gluon exchange. It is argued that the most convenient choice of gauge for the gluon propagator is the radiation gauge.Keywords
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