CP-odd A^0 production at e^+e^- colliders in MSSM with CP violating phases

Abstract

We study the production of a heavy CP-odd $A^0$ boson in association with a photon $e^{+}{e}^{-}\to A^0\gamma$ and a Z boson $e^{+}{e}^{-}\to A^{0}Z$ as well as the single production of $A^0$ via $e^{+}{e}^{-}\to {\nu }_e{\bar{\nu }}_e{A}^0$ in the MSSM with CP violating phases. In the case of $e^{+}{e}^{-}\to A^0\gamma /A^{0}Z$, 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 $e^{+}{e}^{-}\to {\nu }_e{\bar{\nu }}_e{A}^0$ 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 $A_t$, cross sections of the order 0.1 fb are attainable for all the processes $e^{+}{e}^{-}\to A^0\gamma$, $e^{+}{e}^{-}\to A^{0}Z$ and $e^{+}{e}^{-}\to {\nu }_e{\bar{\nu }}_e{A}^0$.

12 pages, latex, 7 eps figures. One new figure, new discussion arroud it. Version to appear in Phys. Rev. D

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Cited by in corpus (6)

• MSSM Higgs Physics at Higher Orders
• Higgs bosons of the NMSSM with explicit CP violation at the ILC
• Neutral Higgs Boson Production at e+e- Colliders in the Complex MSSM: A Full One-Loop Analysis
• Associated production of Higgs boson with a photon at electron-positron colliders
• Enhancement of "CP-odd" Higgs Boson Production in the Minimal Supersymmetric Standard Model with Explicit CP Violation
• e+e- --> nu nu-bar A in the two-Higgs-doublet model