2012/06/26 by S. Chatrchyan, CMS Collaboration, V. Khachatryan +98
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/j.physletb.2012.06.051
published as Phys. Lett. B 714 (2012) 158 · Submitted to Physics Letters B
openalex publication_date 2012/06/26 · arxiv created 2013/01/25 · arxiv updated 2013/01/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
A search for narrow, high-mass resonances decaying to electron or muon pairs has been performed using pp collision data collected at s = 7 TeV 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 resonance, 890 (540) GeV for the Stueckelberg extension Z St with the mass parameter = 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.