• DOI:10.1140/epjc/s10052-017-5160-7
• Corpus ID: 119021722

Combining states without scale hierarchies with ordered parton showers

@article{Fischer2017CombiningSW,
  title={Combining states without scale hierarchies with ordered parton showers},
  author={Nadine Fischer and Stefan Prestel},
  journal={The European Physical Journal C},
  year={2017},
  volume={77},
  pages={1-17}
}

• N. Fischer, S. Prestel
• Published 19 June 2017
• Physics
• The European Physical Journal C

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.