Merging NLO multi-jet calculations with improved unitarization
- Author(s)
- Johannes Bellm, Stefan Gieseke, Simon Plätzer
- Abstract
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(s)
- Particle Physics
- External organisation(s)
- Durham University, Karlsruher Institut für Technologie, University of Manchester
- Journal
- European Physical Journal C
- Volume
- 78
- No. of pages
- 31
- ISSN
- 1434-6044
- Publication date
- 03-2018
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103012 High energy physics
- Keywords
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/merging-nlo-multijet-calculations-with-improved-unitarization(54f553fd-5460-46c5-91a1-3d8c14b93f7f).html