Four loop anomalous dimensions of gradient operators in phi^4 theory

Details Four loop anomalous dimensions of gradient operators in phi^4 theory Four loop anomalous dimensions of gradient operators in phi^4 theory

1997-05-08

arxiv.org/abs/hep-ph/9705268v1

Eur.Phys.J.C2:569-579,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 latex pages, 10 figures (3 postscript files)

Scientific paper

10.1007/s100520050162

We compute the anomalous dimensions of a set of composite operators which involve derivatives at four loops in MSbar in phi^4 theory as a function of the operator moment n. These operators are similar to the twist-2 operators which arise in QCD in the operator product expansion in deep inelastic scattering. By regarding their inverse Mellin transform as being equivalent to the DGLAP splitting functions we explore to what extent taking a restricted set of operator moments can give a good approximation to the exact four loop result.

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