The 2PPI expansion: dynamical mass generation and vacuum energy

Details The 2PPI expansion: dynamical mass generation and vacuum energy The 2PPI expansion: dynamical mass generation and vacuum energy

2003-09-26

arxiv.org/abs/hep-th/0309241v1

Physics

High Energy Physics

High Energy Physics - Theory

5 pages. 2 .eps figures. Talk given at the International Conference on Color Confinement and Hadrons in Quantum Chromodynamics

Scientific paper

We discuss the 2PPI expansion, a summation of the bubble graphs up to all
orders, by means of the 2D Gross-Neveu toy model, whose exact mass gap and
vacuum energy are known. Then we use the expansion to give analytical evidence
that a dimension two gluon condensate exists for pure Yang-Mills in the Landau
gauge. This condensate consequently gives rise to a dynamical gluon mass.

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