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10 papers
Recent Pythia 8 developments: Hard diffraction, Colour reconnection and collisions
Ilkka Helenius, Jesper R. Christiansen, Christine O. Rasmussen
An overview of recent developments in \pythia~8 is given. First the new hard diffraction model, which is implemented as a part of the multiparton interactions (MPI) framework, is d…
Colour Reconnection - Models and Tests
Jesper R. Christiansen
Recent progress on colour reconnection within the Pythia framework is presented. A new model is introduced, based on the SU(3) structure of QCD and a minimization of the potential…
Merging weak and QCD showers with matrix elements
Jesper Roy Christiansen, Stefan Prestel
We present a consistent way of combining associated weak boson radiation in hard dijet events with hard QCD radiation in Drell-Yan-like scatterings. This integrates multiple tree-l…
Effects of Colour Reconnection on Hadron Flavour Observables
Christian Bierlich, Jesper Roy Christiansen
We present a comparison between two recently developed colour reconnection models, the new colour reconnection model in PYTHIA and the DIPSY rope hadronization model. Specifically…
Colour Reconnection at Future Colliders
Jesper R. Christiansen, Torbjörn Sjöstrand
The effects of colour reconnection (CR) at colliders are revisited, with focus on recently developed CR models. The new models are compared with the LEP2…
Proceedings of the Sixth International Workshop on Multiple Partonic Interactions at the Large Hadron Collider
R. Astalos, S. Baranov, P. Bartalini +54
Multiple Partonic Interactions are often crucial for interpreting results obtained at the Large Hadron Collider (LHC). The quest for a sound understanding of the dynamics behind MP…
String Formation Beyond Leading Colour
Jesper R. Christiansen, Peter Z. Skands
We present a new model for the hadronisation of multi-parton systems, in which colour correlations beyond leading are allowed to influence the formation of confining potentia…
An Introduction to PYTHIA 8.2
Torbjörn Sjöstrand, Stefan Ask, Jesper R. Christiansen +7
The PYTHIA program is a standard tool for the generation of events in high-energy collisions, comprising a coherent set of physics models for the evolution from a few-body hard pro…
Weak Gauge Boson Radiation in Parton Showers
Jesper Roy Christiansen, Torbjörn Sjöstrand
The emission of W and Z gauge boson is included in a traditional QCD + QED shower. The unitarity of the shower algorithm links the real radiation of the weak gauge bosons to the ne…
Odd-flavored QCD_3 and Random Matrix Theory
Jesper Christiansen
We consider QCD_3 with an odd number of flavors in the mesoscopic scaling region where the field theory finite-volume partition function is equivalent to a random matrix theory par…