Search for Large Extra Dimensions in Dielectron and Diphoton Production

Abstract

We report a search for effects of large extra spatial dimensions in ppbar collisions at a center-of-mass energy of 1.8 TeV with the DZero detector, using events containing a pair of electrons or photons. The data are in good agreement with the expected background and do not exhibit evidence for large extra dimensions. We set the most restrictive lower limits to date, at the 95% confidence level, on the effective Planck scale between 1.0 TeV and 1.4 TeV for several formalisms and numbers of extra dimensions.

6 pages, 2 figures, submitted to Phys. Rev. Lett

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• Single and Multi-Photon Events with Missing Energy in e+e- Collisions at \sqrt{s} = 189 GeV
• Search for Extra Dimensions in Boson and Fermion Pair Production in e+e- Interactions at LEP
• Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion-pair Production at 189 GeV at LEP
• Discovering a Light Higgs Boson with Light
• Determination of the e+e- -> gamma gamma (gamma) cross-section at centre-of-mass energies ranging from 189 GeV to 202 GeV
• Multi-photon production in e+e- collisions at sqrt(s)= 189 geV

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