par Chatrchyan, Serguei;Clerbaux, Barbara 
;De Lentdecker, Gilles ;Hreus, Tomas ;Gay, Arnaud ;Leonard, Alexandre ;Marage, Pierre ;Reis, Thomas ;Thomas, Laurent ;Vander Velde, Catherine ;Vanlaer, Pascal ;Wang, Jian ;Charaf, Othman ;Dero, Vincent ; [et al.]
Référence Physics letters. Section B, 714, 2-5, page (158-179)
Publication Publié, 2012-08
;De Lentdecker, Gilles ;Hreus, Tomas ;Gay, Arnaud ;Leonard, Alexandre ;Marage, Pierre ;Reis, Thomas ;Thomas, Laurent ;Vander Velde, Catherine ;Vanlaer, Pascal ;Wang, Jian ;Charaf, Othman ;Dero, Vincent ; [et al.]Référence Physics letters. Section B, 714, 2-5, page (158-179)
Publication Publié, 2012-08
Article révisé par les pairs
| Résumé : | A search for narrow, high-mass resonances decaying to electron or muon pairs has been performed using pp collision data collected at s=7TeV by the CMS experiment in 2011. The data sample corresponds to an integrated luminosity of approximately 5 fb -1. 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 ψ ' resonance, 890 (540) GeV for the Stueckelberg extension Z St ' with the mass parameter ε=0.06 (0.04), and 2140 (1810) GeV for Kaluza-Klein gravitons with the coupling parameter k/M- Pl of 0.10 (0.05). These limits are the most stringent to date. |
