The $γγ\to A^0 A^0$ process at a $γγ$ Collider

Details The $γγ\to A^0 A^0$ process at a $γγ$ Collider The $γγ\to A^0 A^0$ process at a $γγ$ Collider

2000-07-12

arxiv.org/abs/hep-ph/0007110v3

Eur.Phys.J.C18:181-193,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

Misprints in typos corrected, 1 reference added e-mail: gounaris@physics.auth.gr

Scientific paper

10.1007/s100520000520

The helicity amplitudes for the process $\gamma \gamma \to A^0 A^0$ are studied to 1-loop order in the minimal SUSY (MSSM) model, where $A^0$ is the CP-odd Higgs particle. Simple exact analytic formulae are obtained, in terms of the $C_0$ and $D_0$ Passarino-Veltman functions; in spite of the fact that the loop-diagrams often involve different particles running along their sides. For a usual mSUGRA set of parameters, $\sigma (\gamma \gamma \to A^0 A^0) \sim (0.1-0.2)\rm fb $ is expected. If SUSY is realized in Nature, these expressions should be useful for understanding the Higgs sector.

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