Richard Corke, Torbjörn Sjöstrand
Multiparton Interactions and Rescattering
The concept of multiple partonic interactions in hadronic events is vital
for the understanding of both minimum-bias and underlying-event physics.
The area is rather little studied, however, and current models offer a far
from complete coverage, even of the effects we know ought to be there. In
this article we address one such topic, namely that of rescattering, where
an already scattered parton is allowed to take part in another subsequent
scattering. A framework for rescattering is introduced for the Pythia 8
event generator and fully integrated with normal multiparton interactions
and initial- and final-state radiation. Using this model, the effects on
event structure are studied, and distributions are shown both for
minimum-bias and jet events.
LU TP 09-28