G.J. Gounaris - P.I. Porfyriadis
Department of Theoretical Physics, Aristotle University of
Thessaloniki, 54006, Thessaloniki, Greece
Received: 12 July 2000 / Published online: 13 November 2000 - © Springer-Verlag 2000
The helicity amplitudes for the process are studied to 1-loop order in the minimal SUSY (MSSM) model, where A0 is the CP-odd Higgs particle. Simple exact analytic formulae are obtained in terms of the C0 and D0 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, -0.2fb is expected. If SUSY is realized in nature, these expressions should be useful for understanding the Higgs sector.
Copyright Società Italiana di Fisica, Springer-Verlag 2000