Effective potential evaluations in a modified PQCD
International Center for Theoretical Physics, Strada Costiera 111, Trieste, Italy
2 Group of Theoretical Physics, Instituto de Cibernética, Matemática y Física, Calle E, No. 309, Vedado, La Habana, Cuba
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Revised: 4 November 2005
Published online: 7 June 2006
A procedure discussed in a previous work for properly defining the Feynman diagrams at any number of loops in a modified version of PQCD, is employed here to evaluate some zero- and one-loop corrections to the effective potential, as functions of the gluon and quark condensate parameters. The calculated terms indicate an instability of massless QCD under the development of quark condensates even in the absence of the gluon one. Therefore, a mechanism is suggested for the dynamical generation of quark masses and condensates. The absence of indications coming from lattice calculations to this possibility could be determined by the current limitations in treating fermion determinants.
© Springer-Verlag, 2006