Preprint

PUBDB-2023-03081

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Refining the GENEVA method for Higgs boson production via gluon fusion

Alioli, S.DESY* ; Billis, G.DESY* ; Broggio, A. ; Gavardi, A.DESY* ; Kallweit, S. ; Lim, M. A.DESY* ; Marinelli, G. ; Nagar, R. (Corresponding author)Extern* ; Napoletano, D.

2023

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Please use a persistent id in citations: doi:10.3204/PUBDB-2023-03081

Report No.: DESY-23-009; UWThPh-2023-2; arXiv:2301.11875

Abstract: We 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 $gg\to H$. 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.

Keyword(s): Higgs particle: production ; gluon: fusion ; parton: showers ; resummation ; multiplicity: high ; splitting function ; two-photon ; phase space ; scale: factorization ; stability ; CMS ; ATLAS ; resolution ; higher-order: 2

Note: 37 pages, 10 figures

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. COLORFREE - High-Precision Global Analysis of Color-Free LHC Processes at Small Recoil (101002090) (101002090)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2023

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Database coverage:
; Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Alioli, S. ; Billis, G.DESY* ; Broggio, A. ; Gavardi, A.DESY* ; Kallweit, S. ; Lim, M. A.DESY* ; Marinelli, G. ; Nagar, R. (Corresponding author)Extern* ; Napoletano, D.
Refining the GENEVA method for Higgs boson production via gluon fusion
Journal of high energy physics 05(5), 128 (2023) [10.1007/JHEP05(2023)128]2023     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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