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Reconciling resummation and renormalization

By A Jakovác

Abstract

In the naive form of most resummations we get into conflict with order-by-order renormalization. We present a method that is capable to ensure UV consistency of any resummations satisfying certain conditions. The method is based on the observation that resummation is equivalent with a calculation in an adequate perturbation scheme, followed by a renormalization scheme changing. This framework works both in static and momentum-dependent cases. In particular it is possible to establish finite infrared 2PI resummation

Topics: Particle Physics - Phenomenology
Year: 2005
OAI identifier: oai:cds.cern.ch:918577
Provided by: CERN Document Server
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