A threshold-improved narrow-width approximation for BSM physics

Details A threshold-improved narrow-width approximation for BSM physics A threshold-improved narrow-width approximation for BSM physics

2007-08-08

arxiv.org/abs/0708.1161v2

JHEP0804:055,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures, version to appear in JHEP

Scientific paper

10.1088/1126-6708/2008/04/055

A modified narrow-width approximation that allows for O(Gamma/M)-accurate
predictions for resonant particle decay with similar intermediate masses is
proposed and applied to MSSM processes to demonstrate its importance for
searches for particle physics beyond the Standard Model.

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