Compact Muon Solenoid
LHC, CERN
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| CMS-EXO-11-019 ; CERN-PH-EP-2012-157 | ||
| Search for narrow resonances in dilepton mass spectra in pp collisions at $\sqrt{s}$ = 7 TeV | ||
| CMS Collaboration | ||
| 9 June 2012 | ||
| Phys. Lett. B 714 (2012) 158-179 | ||
| Abstract: A search for narrow, high-mass resonances decaying to electron or muon pairs has been performed using pp collision data collected at $\sqrt{s}$=7 TeV by the CMS experiment in 2011. The data sample corresponds to an integrated luminosity of approximately 5 inverse femtobarns. The event yields observed in the signal regions are consistent with predictions of the standard model backgrounds, and upper limits on the cross section times branching fraction for a resonance decaying to dileptons are extracted from a shape analysis of the dilepton invariant mass distribution. The resulting mass limits at 95% confidence level are 2330 GeV for the Z' in the Sequential Standard Model, 2000 GeV for the superstring-inspired Z'$_\psi$ resonance, 890 (540) GeV for the Stueckelberg extension Z'$_{St}$ with the mass parameter epsilon=0.06 (0.04), and 2140 (1810) GeV for Kaluza--Klein gravitons with the coupling parameter k/$\bar{M}_{Pl}$ of 0.10 (0.05). These limits are the most stringent to date. | ||
| Links: e-print arXiv:1206.1849 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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