Matrix element corrections in top quark decays for the tt¯W± process
(2024) In European Physical Journal C 84(4).- Abstract
We present a method that allows enabling matrix element corrections (MECs) in Pythia8 with MC@NLO matching, without incurring double counting. MECs are an interesting feature that may contribute to the accuracy of theoretical predictions, alongside matching and merging. We directly compare our method to a specific choice of settings in Pythia8, which can remove double-counting for MECs in certain processes. We show results by taking the tt¯W process as an example. This choice allows us to study the impact of decay MECs in the 2SSℓ and 3ℓ final states. We find that jet-related observables receive these corrections unevenly throughout the phase space. They can contribute up to ±6% in certain regions.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/9ff5171f-2779-487e-a692-1d32f7056997
- author
- Frederix, Rikkert LU ; Gellersen, Leif LU and Nasufi, Jasmina LU
- organization
- publishing date
- 2024-04
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal C
- volume
- 84
- issue
- 4
- article number
- 410
- publisher
- Springer
- external identifiers
-
- scopus:85191030161
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s10052-024-12737-2
- language
- English
- LU publication?
- yes
- id
- 9ff5171f-2779-487e-a692-1d32f7056997
- date added to LUP
- 2024-05-06 13:50:12
- date last changed
- 2024-05-06 13:51:31
@article{9ff5171f-2779-487e-a692-1d32f7056997, abstract = {{<p>We present a method that allows enabling matrix element corrections (MECs) in Pythia8 with MC@NLO matching, without incurring double counting. MECs are an interesting feature that may contribute to the accuracy of theoretical predictions, alongside matching and merging. We directly compare our method to a specific choice of settings in Pythia8, which can remove double-counting for MECs in certain processes. We show results by taking the tt¯W process as an example. This choice allows us to study the impact of decay MECs in the 2SSℓ and 3ℓ final states. We find that jet-related observables receive these corrections unevenly throughout the phase space. They can contribute up to ±6% in certain regions.</p>}}, author = {{Frederix, Rikkert and Gellersen, Leif and Nasufi, Jasmina}}, issn = {{1434-6044}}, language = {{eng}}, number = {{4}}, publisher = {{Springer}}, series = {{European Physical Journal C}}, title = {{Matrix element corrections in top quark decays for the tt¯W± process}}, url = {{http://dx.doi.org/10.1140/epjc/s10052-024-12737-2}}, doi = {{10.1140/epjc/s10052-024-12737-2}}, volume = {{84}}, year = {{2024}}, }