Perturbative formulae for relativistic interactions of effective particles

Details Perturbative formulae for relativistic interactions of effective particles Perturbative formulae for relativistic interactions of effective particles

2012-04-20

arxiv.org/abs/1204.4760v1

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, 1 figure, Acta Phys. Pol. style

Scientific paper

The concept of effective particles as degrees of freedom in a relativistic quantum field theory is defined using a non-perturbative renormalization group procedure for Hamiltonians. However, every candidate for a basic physical theory appears to require an initial perturbative search for the set of interaction terms that may provide a basis with which the full effective theory Hamiltonian could be constructed in a series of successive approximations. This article describes the required perturbative expansion and illustrates it with a set of general 4th-order formulae.

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