KrkNLO matching for colour-singlet processes
Abstract Matched calculations combining perturbative QCD with parton showers are an indispensable tool for LHC physics. Two methods for NLO matching are in widespread use: Mc@Nlo and Powheg. We describe an alternative, KrkNLO, reformulated to be easily applicable to any colour-singlet process. The p...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2025)062 |
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| author | Pratixan Sarmah Andrzej Siódmok James Whitehead |
| author_facet | Pratixan Sarmah Andrzej Siódmok James Whitehead |
| author_sort | Pratixan Sarmah |
| collection | DOAJ |
| description | Abstract Matched calculations combining perturbative QCD with parton showers are an indispensable tool for LHC physics. Two methods for NLO matching are in widespread use: Mc@Nlo and Powheg. We describe an alternative, KrkNLO, reformulated to be easily applicable to any colour-singlet process. The primary distinguishing characteristic of KrkNLO is its use of an alternative factorisation scheme, the ‘Krk’ scheme, to achieve NLO accuracy. We describe the general implementation of KrkNLO in Herwig 7, using diphoton production as a test process. We systematically compare its predictions to those produced by Mc@Nlo with several different choices of shower scale, both truncated to one-emission and with the shower running to completion, and to Atlas data from LHC Run 2. |
| format | Article |
| id | doaj-art-b45e32ff130b4aa28bbf455f370002e8 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-b45e32ff130b4aa28bbf455f370002e82025-01-19T12:07:19ZengSpringerOpenJournal of High Energy Physics1029-84792025-01-012025114610.1007/JHEP01(2025)062KrkNLO matching for colour-singlet processesPratixan Sarmah0Andrzej Siódmok1James Whitehead2Jagiellonian UniversityJagiellonian UniversityJagiellonian UniversityAbstract Matched calculations combining perturbative QCD with parton showers are an indispensable tool for LHC physics. Two methods for NLO matching are in widespread use: Mc@Nlo and Powheg. We describe an alternative, KrkNLO, reformulated to be easily applicable to any colour-singlet process. The primary distinguishing characteristic of KrkNLO is its use of an alternative factorisation scheme, the ‘Krk’ scheme, to achieve NLO accuracy. We describe the general implementation of KrkNLO in Herwig 7, using diphoton production as a test process. We systematically compare its predictions to those produced by Mc@Nlo with several different choices of shower scale, both truncated to one-emission and with the shower running to completion, and to Atlas data from LHC Run 2.https://doi.org/10.1007/JHEP01(2025)062Higher-Order Perturbative CalculationsParton Shower |
| spellingShingle | Pratixan Sarmah Andrzej Siódmok James Whitehead KrkNLO matching for colour-singlet processes Journal of High Energy Physics Higher-Order Perturbative Calculations Parton Shower |
| title | KrkNLO matching for colour-singlet processes |
| title_full | KrkNLO matching for colour-singlet processes |
| title_fullStr | KrkNLO matching for colour-singlet processes |
| title_full_unstemmed | KrkNLO matching for colour-singlet processes |
| title_short | KrkNLO matching for colour-singlet processes |
| title_sort | krknlo matching for colour singlet processes |
| topic | Higher-Order Perturbative Calculations Parton Shower |
| url | https://doi.org/10.1007/JHEP01(2025)062 |
| work_keys_str_mv | AT pratixansarmah krknlomatchingforcoloursingletprocesses AT andrzejsiodmok krknlomatchingforcoloursingletprocesses AT jameswhitehead krknlomatchingforcoloursingletprocesses |