Low-pt dielectron trigger with invariant mass cut J. Leonard 18 March 2009
Strategy • Trigger path • Characterize current HLT • Use OpenHLT objects • Improve HLT path • Write analyzer to plot quantities used to define HLT electrons • Physics analysis • Characterize reconstructed objects • Write analyzer to keep and plot PAT objects and related information • Plot analysis quantities • Invariant mass, , between electrons, etc.
Today • Basic distributions for upsilon and j/ signal samples (~80k events each) • PT (or ET), , for • All generator-level electrons (gen-level quantities) • L1 isolated and non-isolated candidates (L1 quantities) • HLT “startup-window” and “large-window” electrons (HLT quantities) • Multiplicity of HLT SW and LW electrons • HLT and gen-level electrons in events that pass L1 • L1_DoubleEG1 • L1_DoubleEG5
Multiplicity of HLT electrons • J/ • Upsilon
Next Steps • Trigger: • Understand plots (esp. wrt L1 bits) • Iterate with Jonathan H about efficiency plots • Don’t look correct • Instrument HLT path to plot quantities (analyzer) • Analysis • Write analyzer, make plots with reconstructed objects