Summing one-loop graphs in a theory with broken symmetry

Details Summing one-loop graphs in a theory with broken symmetry Summing one-loop graphs in a theory with broken symmetry

1992-09-28

arxiv.org/abs/hep-ph/9209287v1

Phys.Rev. D47 (1993) 3518-3520

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, LaTeX, TPI-MINN-92/50-T

Scientific paper

10.1103/PhysRevD.47.3518

The method suggested by Lowell Brown for calculating multi-particle threshold amplitudes is extended to the one-loop level in scalar theories with broken reflection symmetry. A result for the threshold amplitude for multiparticle production is derived. It is also shown that the tree-level amplitude for 2 on-mass-shell particles producing $n$ particles vanishes at the kinematical threshold for $n>2$

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