Implementation of a medium-modified parton shower algorithm
Abstract
We present a Monte Carlo implementation of medium-induced gluon radiation in the final-state branching process. Medium effects are introduced through an additive term in the splitting functions. We have implemented such modification within PYTHIA. We show the medium effects on the hump-backed plateau, and the transverse momentum and angular distributions with respect to the parent parton. As expected, with increasing medium densities there is an increase (decrease) of partons with small (large) momentum fraction, and angular broadening is observed. The effects on the transverse-momentum distributions are more involved, with an enhancement of low- and intermediate- partons and a decrease at large , which is related to energy conservation, and to the lack of momentum exchange with the medium in our approach.
Cite
@article{arxiv.0809.4433,
title = {Implementation of a medium-modified parton shower algorithm},
author = {N. Armesto and L. Cunqueiro and C. A. Salgado},
journal= {arXiv preprint arXiv:0809.4433},
year = {2009}
}
Comments
LaTeX, 6 pages, 2 eps figures; proceedings of the 3rd International Conference on Hard and Electromagnetic Probes in High-Energy Nuclear Collisions - Hard Probes 2008 (Illa de A Toxa, Spain, June 8th-14th 2008)