Feb. 4,2009 Jongseok Lee (Sungkyunkwan University) Study of pair-produced doubly charged Higgs bosons with a four muon final state at the CMS detector (CMS NOTE 2006/081, Authors : T.Rommerskirchen and T.Hebbeker) Feb. 4,2009 Jongseok Lee (Sungkyunkwan University)

Event generation Signal Number of events generated with PYTHIA for different signal data samples, before any pre-selection Background Number of events generated in the background MC data samples, after pre-selection Generator level pre-selection 1) Final state containing two positive and two negative muons 2) PT>3GeV, |η|<2.4 for all muons

Reconstructed mass of H++ Mass resolution as a function of mH±± The invariant mass distribution of the signal sample and of the four backgrounds

Online event selection Online selection 1) |η|<2.1 (level 1 di-muon trigger requirement) 2) at least two muons with PT>7GeV (high level di-muon trigger requirement) 3) at leat one has to be isolated in the Tracker : ISOLTRK<0.97GeV (high level di-muon trigger requirement)

Offline event selection The number of reconstructed muons 1) PT>8GeV 2) |η|<2.1 Selection efficiency for four reconstructed muons for a signal datasample (mH±±=300GeV) and the background data samples; errors are statistical only Impact point : The muon trajectory is extrapolated to the beamline. The point of closest approach to the origin of the detector coordinate system is defined as Impact Point. The biggest ΔzIPS between muons generated (mH±±=300GeV) zIPS of all muons generated (mH±±=300GeV)

Results reconstructed invariant mass of H±± candidates, (top) after online selection, (bottom) after offline selection

Search for the doubly charged Higgs Feb. 4,2009 Jongseok Lee (Sungkyunkwan University)

Decay mode

Data generation & reconstruction (Full simulation) scramv1 project CMSSW CMSSW_2_1_10 cd CMSSW_2_1_10/src eval `scramv1 runtime -csh cvs co -d Configuration/Generator UserCode/JHGoh/Configuration/Generator cvs co -d HiggsAnalysis UserCode/JHGoh/HiggsAnalysis scramv1 build cd HiggsAnalysis/DoublyChargedHiggs/test cmsDriver.py Hpp200MuMu_cfi.py -s GEN,SIM,DIGI,L1,DIGI2RAW,RAW2DIGI,RECO -n 30 --conditions FrontierConditions_GlobalTag,IDEAL_V9::All --datatier GEN-SIM-DIGI-RECO --eventcontent RECOSIM   --> output : Hpp200MuMu_cfi_py_GEN_SIM_DIGI_L1_DIGI2RAW_RAW2DIGI_RECO.root (30 events) # of event The option tells it to drop everything except RECO and SIM data.

Data generation & reconstruction (Fast simulation) scramv1 project CMSSW CMSSW_2_1_10 cd CMSSW_2_1_10/src eval `scramv1 runtime -csh cvs co -d Configuration/Generator UserCode/JHGoh/Configuration/Generator cvs co -d HiggsAnalysis UserCode/JHGoh/HiggsAnalysis scramv1 build cd HiggsAnalysis/DoublyChargedHiggs/test cmsDriver.py Hpp200MuMu_cfi.py -s GEN,FASTSIM –n 100 --conditions FrontierConditions_GlobalTag,IDEAL_V9::All   --> output : Hpp200MuMu_cfi_py_GEN_FASTSIM.root (100 events) Sets up the geometry (https://twiki.cern.ch/twiki/bin/view/CMS/SWGuideFrontierConditions)

1k events of fast simulation data (generated by Chawon Park)

Track (pt>10, |η|<2.4)

Global muon (pt>10, |η|<2.4)

Mass of two highest PT muons (global μ + global μ, pt>10, |η|<2

MC muon from Higgs (pt>10, |η|<2.4) black : MC muon red : global muon (pt>10,|η|<2.4) black : MC muon red : global muon (pt>10, |η|<2.4)

# of particles per event pt>10, |η|<2.4 black : MC muon red : global muon green : track

Mass (MC μ + MC μ from Higgs, pt>10, |η|<2.4) black : MC muon red : global muon (pt>10,|η|<2.4) black : MC muon red : global muon (pt>10,|η|<2.4)

Muon efficiency global muon efficiency VS pt MC muon efficiency VS pt MC muon efficiency VS η

Mass pt>10, |η|<2.4 black : MC muon + MC muon (from Higgs) red : global muon + global muon green : global muon + global muon (matched global muon with MC muon from Higgs)

30 events of full simulation data backup 30 events of full simulation data

Track (pt>10)

Global muon (pt>10)

Mass of two highest PT muons (global μ + global μ, pt>10)

MC muon from Higgs (no cut) black : MC muon red : global muon (pt>10) black : MC muon red : global muon (pt>10)

Mass (MC μ + MC μ from Higgs, no cut) black : MC muon red : global muon (pt>10) black : MC muon red : global muon (pt>10)

# of particles per event pt>10, |η|<2.4 black : MC muon red : global muon green : track

Muon efficiency global muon efficiency VS pt MC muon efficiency VS pt MC muon efficiency VS η

Mass pt>10, |η|<2.4 black : MC muon + MC muon (from Higgs) red : global muon + global muon green : global muon + global muon (matched global muon with MC muon from Higgs)