Standard Monte Carlo Event Samples

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Standard Monte Carlo Event Samples

• Norman Graf
• SLAC
• November 11, 2004

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Canonical Signal Samples

• Wish to establish a small set of processes which
  can be used to characterize the overall detector
  performance, optimize the designs and compare
  concepts.
• Define a set of benchmark metrics for each
  process.
• Make these samples available to the worldwide LC
  community.

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Possible SM Signal Samples

• WW, ZZ, WW??, ZZ??, Zhh
• dijet mass resolutions, PFA
• Zh
• tracking resolution (recoil mass)
• flavor tagging (branching fractions)
• qq, ??
• dense environment PFA, dca resolution
• tt, tth
• multijet reconstruction, flavor tagging in busy
  environment.

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Beyond-SM Signal Samples

• Vertexing (?-tagging and soft lepton ID)
• Particle Flow (dijet mass, b and ? tagging)
• precisely reconstruct A mass width, (H-A
  splitting?)
• O(0.5) required to determine ?CDMh2
• Tracking Momentum Resolution
• Track Finding Efficiency

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SM Monte Carlo Production

• WHIZARD Monte Carlo was used to generate all
  0,2,4,6-fermion and t quark dominated 8-fermion
  processes (Tim Barklow).
• 1000 fb _at_ 0.5 TeV 2000 fb _at_ 1.0 TeV have been
  generated so far.
• 100 electron and positron polarization is
  assumed in all event generation. Arbitrary
  electron, positron polarization is simulated by
  properly combining data sets.
• Fully fragmented MC data sets are produced.
  PYTHIA is used for final state QED QCD parton
  showering, fragmentation, particle decay.

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Beam-Beam Background

• Most beam-beam background work has focused on
  pairs and high-pt hadrons.
• pairs studied using GuineaPig (T. Maruyama)
• muons from machine backgrounds (L. Keller)
• Muon pairs and low-pt hadrons are also produced
  and perhaps these events are important for
  forward tracking calorimetry.
• WHIZARD simulates virtual photon flux
  beamstrahlung flux (CIRCE). PYTHIA is used to
  model low and high-pt hadronic events.

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Assume constant for
Ecm (GeV)