@HLZ] that, after summing, the Planck mass $M_P$ cancels out of the cross-section, leaving an interaction of near-electroweak strength.

At an $e^+ e^-$ collider, the most-frequently discussed[@GRW; @MPP; @Wilson] signal for ADD gravitons is the process $e^+ e^- \to \gamma G_n$, where $G_n$ is the $n$th Kaluza-Klein excitation of the graviton field. This process leads to single photon events with missing energy and momentum, and is expected to be among the earliest signals of ADD gravity at an $e^+ e^-$ collider. In addition, the process $e^+ e^- \to  \mu^+ \mu^- G_n$ has also been studied[@Eboli]. In this work, we have studied the process $$e^+ e^- \to  e^+ e^- G_n$$ which is simply Bhabha scattering with a radiated graviton. The final state would contain an electron-positron pair with substantial missing energy. The reasons for taking up a study of this process are as follows.

-   At an $e^+ e^-$ collider, final states with an $e^+ e^-$ pair will be one of the first things to be analyzed, since this is needed for beam calibration[@LC]. Among such states, it should be a simple matter to select events with large missing energy as well.

-   Unlike $e^+ e^- \to  \mu^+ \mu^- G_n$, this 