Search for New Dielectron Resonances and Randall-Sundrum Gravitons at   the Collider Detector at Fermilab
  A search for new dielectron mass resonances using data recorded by the CDF II detector and corresponding to an integrated luminosity of 5.7/fb is presented. No significant excess over the expected standard model prediction is observed. In this dataset, an event with the highest dielectron mass ever observed (960 GeV/c^2) was recorded. The results are interpreted in the Randall-Sundrum (RS) model. Combined with the 5.4/fb diphoton analysis, the RS-graviton lower mass limit for the coupling k/\bar{M}_{Pl}=0.1 is 1058 GeV/c^2, making it the strongest limit to date. 
T. Aaltonen, B. Alvarez Gonzalez, S. Amerio, D. Amidei, A. Anastassov,   A. Annovi, J. Antos, G. Apollinari, J.A. Appel, A. ...
hep-ex