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^-1 is presented. No significant excess over the expected standard model prediction is observed. In this data set, an event with the highest dielectron mass ever observed (960 GeV/c²) was recorded. The results are interpreted in the Randall-Sundrum (RS) model. Combined with the 5.4 fb^-1 diphoton analysis, the RS-graviton lower-mass limit for the coupling k/M̄Pl=0.1 is 1058 GeV/c², making it the strongest limit to date.
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Aaltonen et al. (2011) studied this question.
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