The sunset diagram in SU(3) chiral perturbation theory

Details The sunset diagram in SU(3) chiral perturbation theory The sunset diagram in SU(3) chiral perturbation theory

1996-04-09

arxiv.org/abs/hep-ph/9604270v1

Mod.Phys.Lett. A11 (1996) 2115-2128

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, LATEX, 2 LATEX figures

Scientific paper

A general procedure for the calculation of a class of two-loop Feynman diagrams is described. These are two-point functions containing three massive propagators, raised to integer powers, in the denominator, and arbitrary polynomials of the loop momenta in the numerator. The ultraviolet divergent parts are calculated analytically, while the remaining finite parts are obtained by a one-dimensional numerical integration, both below and above the threshold. Integrals of this type occur, for example, in chiral perturbation theory at order p^6.

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