Abstract
The effective Lagrangian of Kogut-Susskind and 't Hooft is examined in connection with interpretation of the additional scalar field as a gluon-pairing field. The pairing effect on the short distance potential is found to be small. A bag limit of the Lagrangian is investigated. Integral representations for interquark potential and nontrivial bag shape are given for heavy quark-antiquark bag states.
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