Two--loop integrals in chiral perturbation theory

Details Two--loop integrals in chiral perturbation theory Two--loop integrals in chiral perturbation theory

1998-03-05

arxiv.org/abs/hep-ph/9803251v1

Eur.Phys.J.C6:297-306,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, LaTeX, 5 figures embedded with epsf.sty

Scientific paper

10.1007/s100520050340

We consider chiral perturbation theory in the meson sector at order $E^6$. In the terminology of the external field technique, the two--loop graphs so generated are of the sunset type. We discuss the evaluation of several of these in the case where the masses of the particles running in the loops are equal. In particular, we present integral representations that are suitable for the evaluation of diagrams in kinematical regions where branch points and cuts are present.

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