Radiative corrections to the decay $H^+ \to W^+ A^0$

Details Radiative corrections to the decay $H^+ \to W^+ A^0$ Radiative corrections to the decay $H^+ \to W^+ A^0$

2000-02-28

arxiv.org/abs/hep-ph/0002288v3

Eur.Phys.J.C20:51-62,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, LaTex, 6 figures, one figure added, appendix shortened. To be published in Eur. Phys. Jour. C

Scientific paper

10.1007/s100520100653

Full one-loop electroweak corrections to the on-shell decay $H^+ \to W^+A^0$ are computed in the framework of models with two Higgs doublets (THDM). Such a decay may be dominant for $H^{\pm}$ over a wide range of parameter space relevant at present and future colliders. We show that the corrections may approach 40% and in particular are sensitive to $\lambda_5$, which parametrizes the discrete symmetry breaking term. We suggest that a measurement of the branching ratio of $H^+ \to W^+A^0$ may offer a possibility of measuring the magnitude of $\lambda_5$.

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