Single and pair production of MSSM Higgs bosons as a probe of scalar-pseudoscalar mixing at e+e- colliders

Abstract

We study the associated production of the $A^0$ neutral CP--odd Higgs boson with a neutral gauge boson $Z$ as well as single production of $A^0$ via $e^{+}{e}^{-}\to {\nu }_e{\bar{\nu }}_e{A}^0$ at the one loop level in the Minimal Supersymmetric Standard Model (MSSM). We show that the MSSM cross--section may be enhanced by light SUSY particles. Then we study the production processes $e^{+}{e}^{-}\to H_i^{0}Z$, $H_i^0{\nu }_e{\bar{\nu }}_e$ and $H_i^0{H}_j^0$ in the context of the MSSM with scalar-pseudoscalar mixing. In a given channel we show that the cross--section for all i (=1,2,3) can be above 0.1 fb provided $M_{H_{2,3}}\text{la}300$ GeV. This should be detectable at a Next Linear Collider and would provide evidence for scalar--pseudoscalar mixing.

Comments: 7 pages, latex, 2 eps figures, preprints LPHEA/2002-05, MPI-PhT/2002-64, Talk given at the 10th International Conference on Supersymmetry and Unification of Fundamental Interactions, DESY, Hamburg, Germany, June 17--23, 2002