• Open Access

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

S. Chatrchyan et al. (CMS Collaboration)
Phys. Rev. Lett. 108, 261803 – Published 27 June 2012

Abstract

Results are presented from a search for new physics in the final state containing a photon (γ) and missing transverse energy (T). The data correspond to an integrated luminosity of 5.0fb1 collected in pp collisions at s=7TeV by the CMS experiment. The observed event yield agrees with standard-model expectations for the γ+T events. Using models for the production of dark-matter particles (χ), we set 90% confidence level (C.L.) upper limits of 13.6–15.4 fb on χ production in the γ+T state. These provide the most sensitive upper limits for spin-dependent χ-nucleon scattering for χ masses (Mχ) between 1 and 100 GeV. For spin-independent contributions, the present limits are extended to Mχ<3.5GeV. For models with 3–6 large extra dimensions, our data exclude extra-dimensional Planck scales between 1.64 and 1.73 TeV at 95% C.L.

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  • Received 4 April 2012

DOI:https://doi.org/10.1103/PhysRevLett.108.261803

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2012 CERN, for the CMS Collaboration

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Vol. 108, Iss. 26 — 29 June 2012

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