Merging NLO multi-jet calculations with improved unitarization

Autor(en)
Johannes Bellm, Stefan Gieseke, Simon Plätzer
Abstrakt

We present an algorithm to combine multiple matrix elements at LO and NLO with a parton shower. We build on the unitarized merging paradigm. The inclusion of higher orders and multiplicities reduce the scale uncertainties for observables sensitive to hard emissions, while preserving the features of inclusive quantities. The combination allows further soft and collinear emissions to be predicted by the all-order parton-shower approximation. We inspect the impact of terms that are formally but not parametrically negligible. We present results for a number of collider observables where multiple jets are observed, either on their own or in the presence of additional uncoloured particles. The algorithm is implemented in the event generator Herwig.

Organisation(en)
Teilchenphysik
Externe Organisation(en)
Durham University, Karlsruher Institut für Technologie, University of Manchester
Journal
European Physical Journal C
Band
78
Anzahl der Seiten
31
ISSN
1434-6044
Publikationsdatum
03-2018
Peer-reviewed
Ja
ÖFOS 2012
103012 Hochenergiephysik
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/merging-nlo-multijet-calculations-with-improved-unitarization(54f553fd-5460-46c5-91a1-3d8c14b93f7f).html