Helicity-Dependent Showers and Matching with VINCIA
High Energy Physics - Phenomenology
2013-04-03 v2
Abstract
We present an antenna-shower formalism that includes helicity dependence for massless partons. The formalism applies to both traditional (global) showers and to sector-based variants. We combine the shower with VINCIA's multiplicative approach to matrix-element matching, generalized to operate on each helicity configuration separately. The result is a substantial gain in computational speed for high parton multiplicities. We present an implementation of both sector and global showers, with min and max variations, and helicity-dependent tree-level matching applied for vector bosons or Higgs decay to q qbar plus up to 4 gluons and for Higgs decay to up to 5 gluons.
Keywords
Cite
@article{arxiv.1301.0933,
title = {Helicity-Dependent Showers and Matching with VINCIA},
author = {Andrew J. Larkoski and Juan J. Lopez-Villarejo and Peter Skands},
journal= {arXiv preprint arXiv:1301.0933},
year = {2013}
}
Comments
Switched sections 2 and 3 for clarity