More Transverse Polarization Signatures of Extra Dimensions at Linear Colliders

Abstract

Polarization of both electron and positron beams at a future linear collider (LC) allows for the measurement of transverse polarization asymmetries. These asymmetries have been shown to be particularly sensitive to graviton or other spin-2, $s-$channel exchanges in the process $e^{+}{e}^{-}\to f\bar{f}(f\ne e)$ which allows for a doubling of the usual search reach. A question then arises as to whether other $e^{+}{e}^{-}$ processes also show comparable sensitivity. Here we extend our previous analysis to the set of final states $e^{+}{e}^{-},W^{+}{W}^{-},2\gamma$ and $2Z$ as well as to the Møller scattering process $e^{-}{e}^{-}\to e^{-}{e}^{-}$. We demonstrate that these reactions yield transverse polarization asymmetries which are somewhat less sensitive to graviton exchange than are those obtained in our earlier analysis for $e^{+}{e}^{-}\to f\bar{f}$.

Comments: 20 pages, 5 figs, LaTex