Particle Flow Calorimetry and ILC Detector Design - Center for High ...

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CCAST-Tsinghua School, 26/4/2009 Mark Thomson 5Why is this important ? Direct impact on physics sensitivity, e.g. “WW-scattering”If the Higgs mechanism is notresponsible for EWSB thenWW fusion processes importante + e - ννWWννqqqq ,e + e - ννZZννqqqqReconstruction of twodi-jet masses allowsdiscrimination of WWand ZZ final statesσ E/E = 0.6/√Eσ E /E = 0.3/√EBest at LEP (ALEPH):σ E/E = 0.6 (1+|cosθ Jet|) /√E(GeV)ILC GOAL:σ E/E = 0.3/√E(GeV)
CCAST-Tsinghua School, 26/4/2009 Mark Thomson 6Wantor more correctlyVery hard (may not be possible) to achieve thiswith a traditional approach to calorimetryLimited by typical HCAL resolution of > 50%/√E(GeV)Rememberthis numbera new approach to calorimetryParticle FlowDual ReadoutNote: this level of performance wasn’t necessary at previous colliders
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Page 15: ILD Software Framework (C++) Everyt
Page 18 and 19: PandoraPFANeed “realistic” Part
Page 26 and 27: Example : MIP segmentsCCAST-Tsinghu
Page 32 and 33: vi) Photon ID/Recovery Use simple c
Page 36 and 37: Putting it all together…CCAST-Tsi
Page 42 and 43: Understanding PFA PerformanceCCAST-
Page 46 and 47: HCAL Depth ResultsCCAST-Tsinghua Sc
Page 48 and 49: Cost drivers:e.g. Radius vs. B-fiel
Page 52 and 53: Particle Flow can deliver ILC jet e
Page 54 and 55: General ConsiderationsCCAST-Tsinghu
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CCAST-Tsinghua School, 26/4/2009 Ma
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CCAST-Tsinghua School, 26/4/2009 Ma
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Thank youCCAST-Tsinghua School, 26/
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Particle Flow Calorimetry and ILC Detector Design - Center for High ...

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