The Underlying-Event Model in PYTHIA (6&8) - Peter Skands - Cern
The Underlying-Event Model in PYTHIA (6&8) - Peter Skands - Cern
The Underlying-Event Model in PYTHIA (6&8) - Peter Skands - Cern
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P. <strong>Skands</strong><br />
<strong>The</strong> Pedestal Effect<br />
MINIMUM BIAS<br />
pT<br />
2<br />
and Multiple Parton-Parton Interactions<br />
PERIPHERAL<br />
= 1<br />
1<br />
5<br />
+<br />
= 6 / 4 = 1.5<br />
QCD ANALOGUE:<br />
P a r t o n S h o w e r s : r e s u m d i v e r g e n t<br />
perturbative emission cross sections<br />
MPI: resum divergent perturbative<br />
<strong>in</strong>teraction cross sections<br />
CENTRAL<br />
= 3<br />
2<br />
5<br />
1<br />
9
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