Introduction to QCD slides - P.Hoyer.pdf - High Energy Physics Group
Introduction to QCD slides - P.Hoyer.pdf - High Energy Physics Group
Introduction to QCD slides - P.Hoyer.pdf - High Energy Physics Group
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Paul <strong>Hoyer</strong> Mugla 2010<br />
Puzzles of <strong>QCD</strong><br />
<strong>QCD</strong> must have Color Confinement: Only color singlet mesons and baryons<br />
can propagate over long distances.<br />
Color confinement is verified numerically in numerical lattice simulations<br />
and modelled phenomenologically, but the mechanism is still poorly unders<strong>to</strong>od.<br />
Baryons and mesons are bound states of quarks. What are the wave functions?<br />
The quarks and gluons bound in hadrons are highly relativistic.<br />
Data and models exist, but no calculations comparable <strong>to</strong> QED a<strong>to</strong>ms.<br />
How can we compare data on hadron final states with perturbative <strong>QCD</strong>?<br />
Fac<strong>to</strong>rization theorems allow <strong>to</strong> express physical measurements in terms of hard,<br />
perturbative subprocesses and universal, measurable quark and gluon distributions.<br />
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