Progress on the Pythia 8 event generator
Progress on the Pythia 8 event generator
Progress on the Pythia 8 event generator
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Strengths and weaknesses<br />
(subjectively, absolute or compared with Herwig++ and Sherpa)<br />
+ fair selecti<strong>on</strong> og built-in processes ready to go<br />
− no built-in ME <strong>generator</strong> (need e.g. MadGraph)<br />
− matching/merging/NLO usually not automatic<br />
± part<strong>on</strong> showers of comparable quality<br />
+ most sophisticated & robust MPI framework<br />
+ models for diffractive <strong>event</strong>s<br />
+ most sophisticated & robust hadr<strong>on</strong>izati<strong>on</strong> framework<br />
− no QED in hadr<strong>on</strong>ic decays (need e.g. Photos)<br />
+ interfaces & many opti<strong>on</strong>s ⇒ flexible<br />
+ user-friendly, well documented, many examples<br />
+ generally comparing well with LHC data . . .<br />
− . . . but known discrepancies, e.g. flavour compositi<strong>on</strong><br />
Torbjörn Sjöstrand <str<strong>on</strong>g>Progress</str<strong>on</strong>g> <strong>on</strong> <strong>the</strong> <strong>Pythia</strong> 8 <strong>event</strong> <strong>generator</strong> slide 45/46
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