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Muon Isolation in 22X Adish Vartak

Muon Isolation in 22X

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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. - PowerPoint PPT Presentation

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Page 1: Muon  Isolation in 22X

Muon Isolation in 22X

Adish Vartak

Page 2: Muon  Isolation in 22X

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

Page 3: Muon  Isolation in 22X

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

Page 4: Muon  Isolation in 22X

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

Page 5: Muon  Isolation in 22X

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

Page 6: Muon  Isolation in 22X

Muon PT (without any cuts)

Page 7: Muon  Isolation in 22X

Muon PT for Drell Yan sample with MC Matching

Page 8: Muon  Isolation in 22X

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

Page 9: Muon  Isolation in 22X

Muon PT for QCD sample with PT > 15 cut

Page 10: Muon  Isolation in 22X

Track PT without any cuts for Drell Yan Sample

Page 11: Muon  Isolation in 22X

Track PT for all tracks for QCD Sample

Page 12: Muon  Isolation in 22X

ΣPT Definition

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

have been considered

Page 13: Muon  Isolation in 22X

ΣPT around Muons (no quality cuts)

Page 14: Muon  Isolation in 22X

ΣPT around Muons (Custom cuts)

Page 15: Muon  Isolation in 22X

ΣPT around Muons (Tight cut)

Page 16: Muon  Isolation in 22X

Normalized ΣPT Integral (no cuts)

Page 17: Muon  Isolation in 22X

Normalized ΣPT Integral (custom cuts)

Page 18: Muon  Isolation in 22X

Normalized ΣPT Integral (tight cuts)

Page 19: Muon  Isolation in 22X

Efficiency Plots for Different Track Qualities

Page 20: Muon  Isolation in 22X

Inner Cone Variation (Custom Quality Cuts)

Page 21: Muon  Isolation in 22X

Outer Cone Variation (Custom Quality Cuts)