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 collected in collisions at by the CMS experiment. The observed event yield agrees with standard-model expectations for the events. Using models for the production of dark-matter particles (), we set 90% confidence level (C.L.) upper limits of 13.6–15.4 fb on production in the state. These provide the most sensitive upper limits for spin-dependent -nucleon scattering for masses () between 1 and 100 GeV. For spin-independent contributions, the present limits are extended to . 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.
- Received 4 April 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.261803
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© 2012 CERN, for the CMS Collaboration