Using Decay Angle Correlations to Detect CP Violation in the Neutral Higgs Sector

Abstract

We demonstrate that decay angle correlations in $\text{taum}\text{taup}$ and $t\text{anti}t$ decay modes could allow a determination of whether or not a neutral Higgs boson is a CP eigenstate. Sensitivity of the correlations is illustrated in the case of the $\text{epem}\text{rta}Z\text{hn}$ and $\text{mupmum}\text{rta}\text{hn}$ production processes for a two-doublet Higgs model with CP-violating neutral sector. A very useful technique for minimizing `depolarization-factor' suppressions of the correlations in the $t\text{anti}t$ mode is introduced.

Comments: 13 pages, phyzzx.tex macro, full postscript file including embedded figure available at ftp://ucdhep.ucdavis.edu/gunion/cpasym.ps