Ghost and Gluon leading power corrections in Landau gauge

P BOUCAUD,F DESOTO,J LEROY,A LEYAOUANC,A LOKHOV,J MICHELI,O PENE,J RODRIGUEZQUINTERO,C ROIESNEL

Nuclear Physics B - Proceedings Supplements（2007）

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摘要

Gluon two- and three-point Green Functions computed in Landau gauge on the lattice have shown the existence of 1/q(2) power corrections to the purely perturbative expressions that can be explained through the Operator Product Expansion as the influence of a gauge dependent mass dimension two condensate. The analysis of the ghost propagator within this framework of gauge-dependent power corrections is now performed.

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关键词

green function,operator product expansion

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