List of previous students

Nicola Orlando
Faten Hariri
Emma Kuwertz
Spyridon Argyropoulo
Sabrina Sacerdoti
Simone Amoroso
Jesper Roy Christiansen
Nathan Hartland
Christian Roehr
Benjamin Watt
Philip Ilten
Nishita Desai
Sercan Sen
Miroslav Myska
Sudha Ahuja
Holger Schulz
Avi Gershan
Aleksander Kusina
Magdalena Slawinska
Flavia Dias
Kenneth Wraight
Irais Bautista Guzman
Sparsh Navin
Paolo Francavilla
Riccardo Di Sipio
Seyi Latunde-Dada
Devdatta Majumder
Martijn Gosselink
Christopher Bignamini
Marek Schönherr
Michal Deak
Noam Hod
Florian Bechtel
Jonathan Ferland
Manuel Bähr
Alexander Flossdorf
Piergiulio Lenzi

Up until this point the modelling of diffraction in Pythia has been primitive. This is a problem for the ALICE collaboration, since typically efficiencies and uncertainties are evaluated by comparing Pythia and Phojet, and these two give appreciably different predictions for diffractive topologies. An improved diffractive description in Pythia would give the ALICE experiment a reduction of the systematic uncertainty on trigger efficiencies and an improved understanding of the underlying event.

During the stay in Lund a new model for diffraction was developed, implemented and tested. In it the Pomeron is described as a hadron-like state, in the Ingelman-Schlein spirit, with a set of different parametrizations of the Pomeron flux and the parton distributions inside the Pomeron. The Pomeron-proton subcollision system then is modelled like an ordinary (inelastic nondiffractive) hadronic collision, including multiparton interactions for high-mass states.

The work is documented in a report: S. Navin, "Diffraction in PYTHIA", LUTP-09-23, MCNET-10-09, arXiv:1005.3894 [hep-ph]