Color matrix element corrections for parton showers
- Author(s)
- Simon Plätzer, Malin Sjodahl, Johan Thoren
- Abstract
We investigate the effects of keeping the full color structure for parton emissions in parton showers for both LEP and LHC. This is done within the Herwig 7 dipole shower, and includes gluon emission, gluon splitting, initial state branching processes, as well as hadronization. The subleading N-c terms are included as color matrix element corrections to the splitting kernels by evolving an amplitude-level density operator and correcting the radiation pattern for each parton multiplicity, up to a fixed number of full color emissions, after which a standard leading color shower takes over. Our results are compared to data for a wide range of LEP and LHC observables and show that the subleading N-c corrections tend to be small for most observables probing hard, perturbative dynamics, for both LEP and LHC. However, for some of these observables they exceed 10%. On soft physics we find signs of significantly larger effects.
- Organisation(s)
- Particle Physics
- External organisation(s)
- Lund University
- Journal
- Journal of High Energy Physics
- Volume
- 2018
- No. of pages
- 28
- ISSN
- 1029-8479
- Publication date
- 11-2018
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103012 High energy physics
- Keywords
- ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/color-matrix-element-corrections-for-parton-showers(ebd2917a-8d60-4d83-806b-1b689dee562a).html