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Quantum Chromo Dynamics
Quarks
Fragmentation
What are jets?
Hadron-hadron collisions
Hadron Collider variables
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Simplifying things . . .
A high-ET event at CDF
Jet Algorithms
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Detectors
Typical detector
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Jet detection
Sampling calorimeters
Scintillator calorimeters
Liquid Argon
Typical calorimeter arrangement
DØ
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What’s happening at high ET?
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Tevatron jet data can constrain PDF’s
Using jets as a probe of quark structure
DØ dijet angular distribution
What have we learned from all this?
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The photon structure function
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e+e– annihilation
e+e– +– e+e– qq e+e– qqg
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DØ b-jet cross section at higher pT
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Hard diffraction
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Rapidity Gaps
Rapidity Gaps at the Tevatron
What does this all mean?
Some final remarks on QCD
Conclusions
Author: Bob Hirosky
Further information: Lecture 2 Vietnam School of Physics Hue 2003