We consider the process $e^{+}{e}^{-}\to N_1{N}_2$, where $N_1$ and $N_2$ are heavy Majorana particles, with relative $\mathrm{CP}$ given by ${\eta }_{\mathrm{CP}}=+1\mathrm{} or -1\mathrm{}$, decaying subsequently via $N_1$, $N_2\to W^{\pm }{e}^{\mp }$. We derive the energy and angle correlation of the dilepton final state, both for like-sign ($e^{\mp }{e}^{\mp }$) and unlike-sign ($e^{-}{e}^{+}$) configurations. Interesting differences are found between the cases ${\eta }_{\mathrm{CP}}=+1\mathrm{} \mathrm{and} -1\mathrm{}$. The characteristics of unlike-sign $e^{+}{e}^{-}$ dileptons originating from a Majorana pair $N_1{N}_2$ are contrasted with those arising from the reaction $e^{+}{e}^{-}\to N\overline{N}\to W^{+}{e}^{-}{W}^{-}{e}^{+}$, where $N\overline{N}$ is a Dirac particle-antiparticle pair.

• Received 11 March 1996

DOI:https://doi.org/10.1103/PhysRevD.54.1944