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

Collaboration
Apr, 2012
27 pages
Published in:
  • Phys.Rev.Lett. 108 (2012) 261803
e-Print:
Report number:
  • CMS-EXO-11-096,
  • CERN-PH-EP-2012-084
Experiments:

Citations per year

201220152018202120240102030405060
Abstract: (arXiv)
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.
Note:
  • Submitted to Phys. Rev. Lett
  • 13.85.Rm
  • 14.80.Nb
  • 14.70.Kv
  • 11.25.Wx
  • p p: scattering
  • cross section: upper limit
  • photon: single production
  • transverse energy: missing-energy
  • dark matter: search for
  • space-time: higher-dimensional
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