JHEP05(2023)128.pdf (1.07 MB)
Refining the GENEVA method for Higgs boson production via gluon fusion
journal contribution
posted on 2023-06-10, 07:04 authored by Simone Alioli, Georgios Billis, Alessandro Broggio, Alessandro Gavardi, Stefan Kallweit, Matthew LimMatthew Lim, Giulia Marinelli, Riccardo Nagar, Davide NapoletanoWe describe a number of improvements to the Geneva method for matching NNLO calculations to parton shower programs. In particular, we detail changes to the resummed calculation used in the matching procedure, including disentangling the cross section dependence on factorisation and beam scales, and an improved treatment of timelike logarithms. We also discuss modifications in the implementation of the splitting functions which serve to make the resummed calculation differential in the higher multiplicity phase space. These changes improve the stability of the numerical cancellation of the nonsingular term at small values of the resolution parameter. As a case study, we consider the gluon-initiated Higgs boson production process gg ? H. We validate the NNLO accuracy of our predictions against independent calculations, and compare our showered and hadronised results with recent data taken at the ATLAS and CMS experiments in the diphoton decay channel, finding good agreement.
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- Published
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- Published version
Journal
Journal of High Energy PhysicsISSN
1029-8479Publisher
Springer Science and Business Media LLCExternal DOI
Issue
128Volume
2023Page range
1-39Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2023-05-19First Open Access (FOA) Date
2023-05-19First Compliant Deposit (FCD) Date
2023-05-18Usage metrics
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