Inclusive search for Φ++ in leptonic final states at √s=7 TeV

Main results

A search for the doubly charged Higgs boson, a member of SU(2)L scalar triplet Φ participating in the seesaw mechanism of type II, in pp collisions at sqrt(s)=7 TeV is presented. The data correspond to an integrated luminosity of 36 pb−1 collected by the CMS experiment at the LHC. The inclusive search is performed in events with three and four isolated charged leptons of all flavours originating from the decays of pair produced triplet components Φ++Φ−− and Φ++Φ−. With the present collected luminosity the CMS experiment is sensitive to the Φ mass range in which the possible decays Φ++ → W+W+ are forbidden kinematically. No signal excess is observed and lower limits at the 95% confidence level are set on the Φ++ mass of 156 GeV in the μμ channel, 154 GeV in eμ channel, of 144 GeV in ee channel and between 116 GeV and 131 GeV in the four defined benchmark points.

Figures from CMS-HIG-11-001

Figure	Label	Description
	Figure 1a. PDF PNG	Feynman diagram of pair-production
	Figure 1b. PDF PNG	Feynman diagram of associated production
	Figure 2. PDF PNG	Cross sections of both pair- and associated production processes
	Figure 3a. PDF PNG	Invariant mass distributions from three lepton final state for 100% branching frations to eτ
	Figure 3b. PDF PNG	Invariant mass distributions from three lepton final state for 100% branching frations to μτ
	Figure 3c. PDF PNG	Invariant mass distributions from three lepton final state for benchmark points
	Figure 4a. PDF PNG	Invariant mass distributions for four lepton final state in BR(Φ++ --> μμ) = 100% scenario
	Figure 4b. PDF PNG	Invariant mass distributions for four lepton final state for integral background and BP4 benchamark point.
	Figure 5a. PDF PNG	95% confidence level exclusion limit for BR(Φ++ --> ee) = 100% scenario
	Figure 5b. PDF PNG	95% confidence level exclusion limit for BR(Φ++ --> eμ) = 100% scenario
	Figure 6a. PDF PNG	95% confidence level exclusion limit for BR(Φ++ --> eτ) = 100% scenario
	Figure 6b. PDF PNG	95% confidence level exclusion limit for BR(Φ++ --> μμ) = 100% scenario
	Figure 7a. PDF PNG	95% confidence level exclusion limit for BR(Φ++ --> μτ) = 100% scenario
	Figure 7b. PDF PNG	95% confidence level exclusion limit for BR(Φ++ --> ττ) = 100% scenario
	Figure 8a. PDF PNG	95% confidence level exclusion limit for BP1
	Figure 8b. PDF PNG	95% confidence level exclusion limit for BP2
	Figure 9a. PDF PNG	95% confidence level exclusion limit for BP3
	Figure 9b. PDF PNG	95% confidence level exclusion limit for BP4

-- MarioKadastik - 12-Mar-2011