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Subleading $N_c$ improved Parton Showers

DESY-11-255
LU-TP-11-48
MCNET-11-27
arXiv:1201.0260
JHEP 1207 (2012) 042

by: Platzer, Simon (DESY) et al.

Abstract:
We describe an algorithm for improving subsequent parton shower emissions by full SU(3) color correlations in the framework of a dipole-type shower. As a proof of concept, we present results from the first implementation of such an algorithm for a final state shower. The corrections are found to be small for event shapes and jet rates but can be more significant for tailored observables.

Multiple Partonic Interaction Developments in Herwig++

arXiv:1110.2675
KA-TP-29-2011
MCNET-11-25

by: Gieseke, S. (KIT, Karlsruhe, TP) et al.

Abstract:
We briefly review the status of the multiple partonic interaction model in the Herwig++ event generator. First, we show how a change in the colour structure of an event in Herwig++ results in a significant improvement in the description of soft inclusive observables in $pp$ interactions at $\sqrt{s}=900$ GeV. Then we present a comparison of some model results to ATLAS Underlying Event data at $\sqrt{s}=7$ TeV.

Monte Carlo Tools for Jet Quenching

arXiv:1109.1466
IPPP-11-52
DCPT-11-106
MCNET-11-21
J.Phys. G38 (2011) 124018

by: Zapp, Korinna (Durham U., IPPP)

Abstract:
A thorough understanding of jet quenching on the basis of multi-particle final states and jet observables requires new theoretical tools. This talk summarises the status and propects of the theoretical description of jet quenching in terms of Monte Carlo generators.

A Positive-Weight Next-to-Leading-Order Monte Carlo Simulation of Deep Inelastic Scattering and Higgs Boson Production via Vector Boson Fusion in Herwig++

KA-TP-12-2011
SFB-CPP-11-29
MCNET-11-14
DCPT-11-66
IPPP-11-33
arXiv:1106.2983
Eur.Phys.J. C72 (2012) 2042

by: D'Errico, Luca (KIT, Karlsruhe, TP) et al.

Abstract: