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

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CCAST-Tsinghua School, 26/4/2009 Mark Thomson 27ProximityDistance betweenhits : limited to firstpseudo-layers of clusterShower ConeAssociated if fraction ofhits in cone > some valueShower start identified+Track-Driven Shower ConeApply looser cuts if have low E clusterassociated to high E track
CCAST-Tsinghua School, 26/4/2009 Mark Thomson 28v) Iterative Reclustering Upto this point, in most cases per<strong>for</strong>mance is good –but some difficult cases…30 GeV π +20 GeV n At some point hit the limit of “pure” particle flow just can’t resolve neutral hadron in hadronic showerThe ONLY(?) way to addressthis is “statistically”e.g. if have 30 GeV trackpointing to 20 GeV clusterSOMETHING IS WRONG
Page 5 and 6: CCAST-Tsinghua School, 26/4/2009 Ma
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
Page 60: Thank youCCAST-Tsinghua School, 26/

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