Brian A. Cole - Thy Phy Bnl

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Picturing (and understanding) high-pT physicsVirtuality evolution:low → high resolution• Copious radiation by all color charges– Angular ordered initial, final state parton showers⇒ For high-Q 2 processes, hard radiation (jets) in → shower– Subtle physics in QCD description of soft radiation6
7Picturing (and understanding) high-pT physics2 jet event (?) 3 jet event (?) 2, 3, ? jet event• There is no unique relationbetween diagrams andnumbers of jets• There is no unique separationbetween the hard scatteringand the parton shower(s)Where does “hard”scattering end and theparton shower(fragmentation) begin
Page 1 and 2: High pT Physics: LHC ProspectsBrian
Page 3 and 4: CMS Event Display3
Page 5: 5Picturing (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 and 24: 23Jet Modifications: ExpectationsWi
Page 25 and 26: ATLAS: Modified Fragmentation Func.
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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