Search for heavy narrow dilepton resonances in pp collisions at s=7 TeV and s=8 TeV

CMS Collaboration

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at s=7 TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1 fb−1, respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model ZSSM resonance lighter than 2590 GeV, a superstring-inspired Zψ lighter than 2260 GeV, and Kaluza–Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter k/M¯Pl is 0.10 (0.05). These are the most stringent limits to date.

Original languageEnglish (US)
Pages (from-to)63-82
Number of pages20
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume720
Issue number1-3
DOIs
StatePublished - Mar 13 2013

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Keywords

  • CMS
  • Electrons
  • Muons
  • Physics
  • Resonances
  • Z

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