Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy

Abstract

Results are presented from a search for new physics in the final state containing a photon and missing transverse energy. The data correspond to an integrated luminosity of 5.0 inverse femtobarns collected in pp collisions at sqrt(s) = 7 TeV by the CMS experiment. The observed event yield agrees with standard-model expectations for the photon-plus-missing-transverse-energy events. Using models for production of dark-matter particles (chi), we set 90% confidence level (C.L.) upper limits of 13.6--15.4 femtobarns on chi production in the photon-plus-missing-transverse-energy state. These provide the most sensitive upper limits for spin-dependent chi-nucleon scattering for chi masses between 1 and 100 GeV. For spin-independent contributions, the present limits are extended to chi masses below 3.5 GeV. For models with 3--6 large extra dimensions, our data exclude extra-dimensional Planck scales between 1.65 and 1.71 TeV at 95% C.L.

Submitted to Phys. Rev. Lett

References in corpus (10)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
• Constraints on Dark Matter from Colliders
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• The PDF4LHC Working Group Interim Recommendations
• The Tevatron at the Frontier of Dark Matter Direct Detection
• Improved Limits on Spin-Dependent WIMP-Proton Interactions from a Two Liter CF${}_3$I Bubble Chamber
• First Results of the Phase II SIMPLE Dark Matter Search
• Search for Large Extra Dimensions via Single Photon plus Missing Energy Final States at sqrt(s) = 1.96 TeV

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