muon isolation in 22x

Muon Isolation in 22X

Adish Vartak

Monte Carlo samples used

• /QCDpt80/Summer08_IDEAL_V11_redigi_v1/GEN-SIM-RECO

• /Zmumu/Summer08_IDEAL_V11_redigi_v2/GEN-SIM-RECO

• 100,000 events from each of the files have been used

• CMSSW 2_2_9 was used for the study

Tracker Isolation

• Muon from QCD sample– 15 GeV/c cut on reco muon PT

• Muon from the Drell Yan sample– 15 GeV/c cut on reco muon PT

– MC Truth matching:• Gen pdgId * charge of reco muon = -13• Gen muon status = 1• Gen muon parent is Z• δR between gen and reco muon < 0.5• δPT/PT Gen between Gen and reco muon < 0.5

Track Quality

• Certain custom set of cuts were borrowed from Matt’s earlier study. I refer to these as custom cuts

• There are built in quality flags in the reco Track object– loose, tight and highPurity

Matt’s Custom Set of Cuts (New Quality Cuts)

Muon PT (without any cuts)

Muon PT for Drell Yan sample with MC Matching

Muon PT for Drell Yan sample with MC Matching and Pt > 15 cut

Muon PT for QCD sample with PT > 15 cut

Track PT without any cuts for Drell Yan Sample

Track PT for all tracks for QCD Sample

ΣPT Definition

• Outer cone radius : 0.3• Inner Cone radius : 0.015• Tracks with no cuts, custom cuts and tight cuts

have been considered

ΣPT around Muons (no quality cuts)

ΣPT around Muons (Custom cuts)

ΣPT around Muons (Tight cut)

Normalized ΣPT Integral (no cuts)

Normalized ΣPT Integral (custom cuts)

Normalized ΣPT Integral (tight cuts)

Efficiency Plots for Different Track Qualities

Inner Cone Variation (Custom Quality Cuts)

Outer Cone Variation (Custom Quality Cuts)