Search for Large Extra Dimensions via Single Photon plus Missing Energy Final States at sqrt(s) = 1.96 TeV

Abstract

We report on a search for large extra dimensions in a data sample of approximately 1 fb^{-1} of ppbar collisions at sqrt(s) = 1.96 TeV. We investigate Kaluza-Klein graviton production with a photon and missing transverse energy in the final state. At the 95% C.L. we set limits on the fundamental mass scale M_{D} from 884 GeV to 778 GeV for two to eight extra dimensions.

Figures (3)

• Figure 1: DCA distribution for the selected events in data (points with statistical uncertainties). The different histograms represent the estimated background composition from the template fit to this distribution. The inset figure compares the individual template shapes.
• Figure 2: Photon $p_{T}$ distribution for the final candidate events (data points show statistical uncertainties), after all the selection requirements. The LED signal is stacked on top of SM backgrounds.
• Figure 3: Expected and observed lower limits on $M_{D}$ for LED in the $\gamma + \hbox{${\hbox{$E$/}}_T$}$ final state. CDF limits with $87$ pb$^{-1}$ of data cdfrun1, and the LEP combined limits lep1 are also shown.