Triple Pseudoscalar Decay Mode, $Z\to AAA$

Abstract

We analyze the production of triple pseudoscalar Higgs bosons in the decay channel of $Z\to AAA$ for light pseudoscalar bosons when the corresponding scalar boson is too heavy to be produced by $Z$ decay. Analytic results are obtained both at the tree level and at the one--loop level. The branching fraction can be as large as $10^{-5}$ which should be detectable at LEP.

Comments: 9 TeX pages and one page of Fig. 2 in postscript format. The whole ps file is in http://www.uic.edu/~keung/pub/aaa.ps