Unique Identification of Graviton Exchange Effects ine+e−Collisions

Many types of new physics can lead to contact interaction-like modificationsin e^+ e^- processes below direct production threshold. We examine thepossibility of uniquely identifying the effects of graviton exchange, which areanticipated in many extra dimensional theories, from amongst this large set ofmodels by using the moments of the angular distribution of the final stateparticles. In the case of the e^+ e^- --> f bar{f} process we demonstrate thatthis technique allows for the unique identification of the graviton exchangesignature at the 5 sigma level for mass scales as high as 6 sqrt(s). Theextension of this method to the e^+ e^- --> W^+ W^- process is also discussed.Comment: 21 pages, 3 figs, LaTe