Muon Transverse Momentum Resolution

Introduction

Muons are basic components in most analysis in CMS, therefore it is necessary to understand completely the detector and software response to muons in many differenty energy ranges.

Datasets

7 RECO samples with different muonPt values were generated using muonPtGun, with 500 events each. The skeleton for the config file was obtained using cmsDriver.py with Global Tag = START42_V12 in CMSSW_4_2_5.

7 samples: 100, 200, 400, 600, 800, 1000, 1200 GeV in muonPt

Muon Pt Analysis

The Muon Pt Analysis is based on the results for the Pt as measured using the three standard tevMuons track refits (TPFMS, Picky, Global) and Cocktail track refit.

The cocktail method was used for the full muons and for the odd + even tracks.

To use the cocktail method for odd + even tracks: tevMuonTracks = cms.string('tevMuonsOdd...')

Pt Resolution measurement

Pt resolution was estimated according to the pt and 1/pt distributions, and measured as the std dev of a Gaussian Fit and as the RMS to take into account the tails in the distribution.