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

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

2002-07-26

arxiv.org/abs/hep-ph/0207330v2

Phys.Rev. D67 (2003) 015003

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevD.67.015003

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 $e^+e^- \to \nu_e \bar{\nu}_e A^0$.

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