Brian A. Cole - Thy Phy Bnl

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Jets in A+A: Underlying eventPb + Pb + 70 GeV jetPb + Pb + 70 GeV jetbackgroundsubtracted• Underlying event affects jet energy resolution• But, far worse, can produce false jets–Crucial issue for A+A jet measurements⇒ Important to optimize signal/background (smaller “R”) 24
ATLAS: Modified Fragmentation Func.ATLAS PreliminarypT > 2 GeV/cBackground =tracks fromunderlyingeventArmesto et almodified FFD(z)•Comparison of input hadron zdistribution to reconstructed–With tracking efficiency correction⇒But prior to corrections for jetenergy resolution25
Page 1 and 2: High pT Physics: LHC ProspectsBrian
Page 3 and 4: CMS Event Display3
Page 5 and 6: 5Picturing (and understanding) high
Page 7 and 8: 7Picturing (and understanding) high
Page 9 and 10: Picturing (and understanding) jetsR
Page 11 and 12: Jet Algorithms, considerations• J
Page 13 and 14: Different Jet Algorithms13
Page 15 and 16: (very) Preliminary LHC Jet Data: CM
Page 17 and 18: ATLAS Charged Particle Spectrum•
Page 19 and 20: Understanding A+A Jet MeasurementsC
Page 21 and 22: Jet “Suppression”Vitev,Ratio of
Page 23: 23Jet Modifications: ExpectationsWi
Page 27 and 28: True Jet measurements in progressST
Page 29: Prospects• 7 TeV p-p- LHC magnets

Brian A. Cole - Thy Phy Bnl

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