Mass Scales and Their Relations in Symmetric Quantum Field Theory

Details Mass Scales and Their Relations in Symmetric Quantum Field Theory Mass Scales and Their Relations in Symmetric Quantum Field Theory

2003-04-12

arxiv.org/abs/hep-th/0304122v2

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, revised version to appear in the Brazilian Journal of Physics

Scientific paper

We illustrate the importance of mass scales and their relation in the specific case of the linear sigma model within the context of its one loop Ward identities. In the calculation it becomes apparent the delicate and essential connection between divergent and finite parts of amplitudes. The examples show how to use mass scales identities which are absolutely necessary to manipulate graphs involving several masses. Furthermore, in the context of the Implicitly Regularization, finite(physical) and divergent (counterterms) parts of the amplitude can and must be written in terms of a single scale which is the renormalization group scale. This facilitates, e.g., obtaining symmetric counterterms and immediately lead to the proper definition of Renormalization Group Constants.

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