Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy
CMS Collaboration (ukupan broj autora: 2209)
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Results are presented from a search for new physics in the final state containing a photon (gamma) and missing transverse energy (is not an element of(T)). The data correspond to an integrated luminosity of 5.0 fb(-1) collected in pp collisions at root s = 7 TeV by the CMS experiment. The observed event yield agrees with standard-model expectations for the gamma + is not an element of(T) events. Using models for the production of dark-matter particles (chi), we set 90% confidence level (C. L.) upper limits of 13.6-15.4 fb on chi production in the gamma + is not an element of(T) state. These provide the most sensitive upper limits for spin-dependent chi-nucleon scattering for chi masses (M-chi) between 1 and 100 GeV. For spin-independent contributions, the present limits are extended to M-chi LT 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.
Извор:Physical Review Letters, 2012, 108, 26
- FMSR (Austria), FNRS (Belgium), FWO (Belgium), CNPq (Brazil), CAPES (Brazil), FAPERJ (Brazil), FAPESP (Brazil), MES (Bulgaria), CERN, CAS (China), MoST (China), NSFC (China), COLCIENCIAS (Colombia), MSES (Croatia), RPF (Cyprus), MoER (Estonia) [SF0690030s09], ERDF (Estonia), Academy of Finland, MEC (Finland), HIP (Finland), CEA (France), CNRS/IN2P3 (France), BMBF, Germany, DFG (Germany), HGF (Germany), GSRT (Greece), OTKA (Hungary), NKTH (Hungary), DAE (India), DST (India), IPM (Iran), SFI (Ireland), INFN (Italy), NRF (Korea), WCU (Korea), LAS (Lithuania), CINVESTAV (Mexico), CONACYT (Mexico), SEP (Mexico), UASLP-FAI (Mexico), MSI (New Zealand), PAEC (Pakistan), MSHE (Poland), NSC (Poland), FCT (Portugal), JINR (Armenia), JINR (Belarus), JINR (Georgia), JINR (Ukraine), JINR (Uzbekistan), MON (Russia), RosAtom (Russia), RAS (Russia), RFBR (Russia), MSTD (Serbia), MICINN (Spain), CPAN (Spain), Swiss Funding Agencies (Switzerland), NSC (Taipei), TUBITAK (Turkey), STFC (U.K.), DOE (U.S.), NSF (U.S.), TAEK (Turkey)
ISSN: 0031-9007 (print); 1079-7114 (electronic)