Combining states without scale hierarchies with ordered parton showers
Abstract
We present a parameter-free scheme to combine fixed-order multi-jet results with parton-shower evolution. The scheme produces jet cross sections with leading-order accuracy in the complete phase space of multiple emissions, resumming large logarithms when appropriate, while not arbitrarily enforcing ordering on momentum configurations beyond the reach of the parton-shower evolution equation. This requires the development of a matrix-element correction scheme for complex phase-spaces including ordering conditions as well as a systematic scale-setting procedure for unordered phase-space points. The resulting algorithm does not require a merging-scale parameter. We implement the new method in the Vincia framework and compare to LHC data.
Keywords
Cite
@article{arxiv.1706.06218,
title = {Combining states without scale hierarchies with ordered parton showers},
author = {Nadine Fischer and Stefan Prestel},
journal= {arXiv preprint arXiv:1706.06218},
year = {2017}
}
Comments
updated to version published in EPJC