Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy
Name
Chatrchyan-2012-Search for Dark Matter and Large Extra.pdf
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552.65 KB
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Author(s)
Bauer, Gerry P.
Bendavid, Joshua L.
Busza, Wit
Cali, Ivan Amos
Chan, M.
Dutta, Valentina
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Hahn, Kristian Allan
Kim, Y.
Date Issued
April 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Chatrchyan, S. et al. “Search for Dark Matter and Large Extra Dimensions in Pp Collisions Yielding a Photon and Missing Transverse Energy.” Physical Review Letters 108.26 (2012): 261803. © 2012 American Physical Society.
Version
Final published version
Abstract
Results are presented from a search for new physics in the final state containing a photon (γ) and missing transverse energy (E̸T). The data correspond to an integrated luminosity of 5.0 fb-1 collected in pp collisions at √s=7 TeV by the CMS experiment. The observed event yield agrees with standard-model expectations for the γ+E̸T 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+E̸T 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<3.5 GeV. 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.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.108.261803
