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Low-pt dielectron trigger with invariant mass cut

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

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Low-pt dielectron trigger with invariant mass cut

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  1. Low-pt dielectron trigger with invariant mass cut J. Leonard 18 March 2009

  2. 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.

  3. 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

  4. Gen-level, L1, HLT plot: ET (Upsilon

  5. Gen-level, L1, HLT plot: ET (J/

  6. Gen-level, L1, HLT plot: (Upsilon)

  7. Gen-level, L1, HLT plot: (Upsilon)

  8. Gen-level electron ET for events that pass L1 (Upsilon)

  9. HLT LW electron ET for events that pass L1 (Upsilon)

  10. Multiplicity of HLT electrons • J/ • Upsilon

  11. 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

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