Muon reconstruction and identification with the Run Ⅱ D0 detector

摘要

We present an overview of the muon reconstruction and identification methods employed by the D0 collaboration to analyze the Run Ⅱ (2001-2011) pp data of the Fermilab Tevatron collider at s~(1/2) = 1.96 TeV. We discuss the performance of these methods, how it is measured using D0 data, and how it is properly modeled by the D0 simulation program. In its pseudorapidity acceptance,∣η∣＜ 2, the muon system identifies high-p_T muons (p_T(≧)10 GeV) with efficiencies ranging from 72% to 89%. Muons tracks are reconstructed in the D0 central tracking system with efficiencies ranging from 85% to 92% and with a typical relative momentum resolution of 10% for p_T = 40 GeV. Isolation criteria reject multijet background with efficiencies of 87-99%.