2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C 12, 451-460
DOI 10.1007/s100529900266

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

A. Akeroyd1 - A. Arhrib2,3,4 - E. Naimi3,4

1 Departamento de Física Teórica, IFIC/CSIC, Universidad de Valencia, 46100 Burjassot, Valencia, Spain
2 Departemento de Fisica-CENTRA, Instituto Superior Técnico, Av Rovisco Pais 1, 1096 Lisboa Codex, Portugal
3 Département de Mathématiques, Faculté des Sciences et Techniques, B.P 416, Tanger, Morocco
4 UFR-High Energy Physics, Physics Departement, Faculty of Sciences, PO Box 1014, Rabat, Morocco

Received: 22 April 1999 / Published online: 10 December 1999

We compute the fermionic radiative contributions to the decay $H^+ \to W^{+(*)} A^0$ in the framework of models with two Higgs doublets (2HDM), for the case of an on-shell and off-shell W. We show that, in the majority of the cases, current measurements of the $\rho$ parameter suggest $M_{H^{\pm}}\ge M_A$and such decays could invalidate current charged Higgs searches or aid detection in the region $M_{H^{\pm}}\approx M_W$. We find that the radiative corrections may approach $50\%$ for small values of $\tan\beta$.

Copyright Springer-Verlag 2000