Combining states without scale hierarchies with ordered parton showers
(2017) In European Physical Journal C 77(9).- 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... (More)
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.
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- author
- Fischer, Nadine LU and Prestel, Stefan LU
- publishing date
- 2017-09-01
- type
- Contribution to journal
- publication status
- published
- in
- European Physical Journal C
- volume
- 77
- issue
- 9
- article number
- 601
- publisher
- Springer
- external identifiers
-
- scopus:85029605679
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s10052-017-5160-7
- language
- English
- LU publication?
- no
- id
- 85a0368a-d256-4734-bbb7-dc9bce914447
- date added to LUP
- 2019-05-16 13:33:14
- date last changed
- 2022-04-25 23:54:46
@article{85a0368a-d256-4734-bbb7-dc9bce914447, abstract = {{<p>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.</p>}}, author = {{Fischer, Nadine and Prestel, Stefan}}, issn = {{1434-6044}}, language = {{eng}}, month = {{09}}, number = {{9}}, publisher = {{Springer}}, series = {{European Physical Journal C}}, title = {{Combining states without scale hierarchies with ordered parton showers}}, url = {{http://dx.doi.org/10.1140/epjc/s10052-017-5160-7}}, doi = {{10.1140/epjc/s10052-017-5160-7}}, volume = {{77}}, year = {{2017}}, }