Color matrix element corrections for parton showers

Autor(en)
Simon Plätzer, Malin Sjodahl, Johan Thoren
Abstrakt

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(en)
Teilchenphysik
Externe Organisation(en)
Lund University
Journal
Journal of High Energy Physics
Band
2018
Anzahl der Seiten
28
ISSN
1029-8479
Publikationsdatum
11-2018
Peer-reviewed
Ja
ÖFOS 2012
103012 Hochenergiephysik
Schlagwörter
ASJC Scopus Sachgebiete
Nuclear and High Energy Physics
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/color-matrix-element-corrections-for-parton-showers(ebd2917a-8d60-4d83-806b-1b689dee562a).html