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Search for diphoton events with large missing transverse energy in 7 TeV proton proton collisions with the ATLAS detector

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Figure

FIG. 1.ET spectrum of the leading photon for the �� candi-date sample and for UED 1=R ¼ 700 GeV MC events (normal-ized to 100 times the leading order (LO) cross section).
FIG. 2 (color online).EVariable sized bins are used, and the vertical error bars andground (normalized to its expected total ofthemissTspectra for the �� candidates, for Z ! ee and misidentified jet samples used to model the QCDbackground (each normalized to the number of �� candidateswith EmissT< 20 GeV), and for the Wð! e�Þ þ jets=� back- � 0:4 events).shaded bands show the statistical errors.
TABLE I.The number of observedis the control region used to normalize the QCD background to the number of observed �� candidates, as well as the SM backgrounds estimated from data and expected UED signal for1=R values of 500 and 700 GeV, given in various E
FIG. 4 (color online).95%Cproduction cross section, and the LO theory cross section pre-diction, as a function of:L: upper limits on the UED 1=R

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