CP-odd A⁰ production at e+e- colliders in MSSM with CP violating phases
Arhrib, Abdesslam
Original · EN
We study the production of a heavy CP-odd A⁰ boson in association with a photon e+e-→ A⁰γ and a Z boson e+e-→ A⁰ Z as well as the single production of A⁰ via e+e- → νₑνₑ A⁰ in the MSSM with CP violating phases. In the case of e+e-→ A⁰γ/ A⁰ Z, we show that the squark contribution, which vanishes in the MSSM with real parameters, turns out to be sizeable in presence of CP violating phases in the soft SUSY parameters. For e+e- → νₑ νₑ A⁰ in both the 2HDM and MSSM with real parameters, the cross section does not reach observable rates at a NLC. It is found that with a large CP violating phase for Aₜ, cross sections of the order 0.1 fb are attainable for all the processes e+e-→ A⁰γ, e+e-→ A⁰ Z and e+e- → νₑ νₑ A⁰.
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