Refining the GENEVA method for Higgs boson production via gluon fusion

Simone Alioli; Georgios Billis; Alessandro Broggio; Alessandro Gavardi; Stefan Kallweit; Matthew A. Lim; Giulia Marinelli; Riccardo Nagar; Davide Napoletano

doi:10.1007/JHEP05(2023)128

Refining the GENEVA method for Higgs boson production via gluon fusion

Simone Alioli
, Georgios Billis
, Alessandro Broggio
, Alessandro Gavardi
, Stefan Kallweit
, Matthew A. Lim
, Giulia Marinelli
, Riccardo Nagar (Korresp. Autor*in)
, Davide Napoletano

Teilchenphysik

Veröffentlichungen: Beitrag in Fachzeitschrift › Artikel › Peer Reviewed

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 → 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.

Originalsprache	Englisch
Aufsatznummer	128
Seitenumfang	39
Fachzeitschrift	Journal of High Energy Physics
Jahrgang	2023
Ausgabenummer	5
DOIs	https://doi.org/10.1007/JHEP05(2023)128
Publikationsstatus	Veröffentlicht - 16 Mai 2023

Fördermittel

We thank L. Rottoli for his collaboration in the early stages of this project and for useful exchanges regarding the study presented in the appendix. We are also grateful to A. Cueto, M. Donega, M. Malberti, and S. Pigazzini for their help with the comparison of Geneva with the ATLAS and CMS results. We thank F. Tackmann for providing us with a preliminary version of scetlib and for useful comments to the manuscript. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant agreements No. 714788 REINVENT and 101002090 COLORFREE) The work of SA and GB is supported by MIUR through the FARE grant R18ZRBEAFC. SA also acknowledges funding from Fondazione Cariplo and Regione Lombardia, grant 2017-2070. MAL is supported by the Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy — EXC 2121 “Quantum Universe” — 390833306, and also by the UKRI guarantee scheme for the Marie Skłodowska-Curie postdoctoral fellowship, grant ref. EP/X021416/1. We acknowledge the CINECA and the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DEAC02-05CH11231, for the availability of the high performance computing resources needed for this work. We thank L. Rottoli for his collaboration in the early stages of this project and for useful exchanges regarding the study presented in the appendix. We are also grateful to A. Cueto, M. Donega, M. Malberti, and S. Pigazzini for their help with the comparison of Geneva with the ATLAS and CMS results. We thank F. Tackmann for providing us with a preliminary version of scetlib and for useful comments to the manuscript. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant agreements No. 714788 REINVENT and 101002090 COLORFREE) The work of SA and GB is supported by MIUR through the FARE grant R18ZRBEAFC. SA also acknowledges funding from Fondazione Cariplo and Regione Lombardia, grant 2017-2070. MAL is supported by the Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy — EXC 2121 “Quantum Universe” — 390833306, and also by the UKRI guarantee scheme for the Marie Skłodowska-Curie postdoctoral fellowship, grant ref. EP/X021416/1. We acknowledge the CINECA and the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DEAC02-05CH11231, for the availability of the high performance computing resources needed for this work.

ÖFOS 2012

103036 Theoretische Physik

Zugriff auf Dokument

10.1007/JHEP05(2023)128Lizenz: CC BY 4.0

Andere Dateien und Links

Verknüpfung zur Publikation in Scopus

Zitationsweisen

@article{effd7fe015784a079a96e20b4815be2d,

title = "Refining the GENEVA method for Higgs boson production via gluon fusion",

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 → 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.",

keywords = "hep-ph, hep-ex, Resummation, Higgs Production, Parton Shower, Higher-Order Perturbative Calculations",

author = "Simone Alioli and Georgios Billis and Alessandro Broggio and Alessandro Gavardi and Stefan Kallweit and Lim, \{Matthew A.\} and Giulia Marinelli and Riccardo Nagar and Davide Napoletano",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s).",

year = "2023",

month = may,

day = "16",

doi = "10.1007/JHEP05(2023)128",

language = "English",

volume = "2023",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer",

number = "5",

}

TY - JOUR

T1 - Refining the GENEVA method for Higgs boson production via gluon fusion

AU - Alioli, Simone

AU - Billis, Georgios

AU - Broggio, Alessandro

AU - Gavardi, Alessandro

AU - Kallweit, Stefan

AU - Lim, Matthew A.

AU - Marinelli, Giulia

AU - Nagar, Riccardo

AU - Napoletano, Davide

PY - 2023/5/16

Y1 - 2023/5/16

N2 - 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 → 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.

AB - 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 → 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.

KW - hep-ph

KW - hep-ex

KW - Resummation

KW - Higgs Production

KW - Parton Shower

KW - Higher-Order Perturbative Calculations

UR - https://www.scopus.com/pages/publications/85160099498

U2 - 10.1007/JHEP05(2023)128

DO - 10.1007/JHEP05(2023)128

M3 - Article

SN - 1029-8479

VL - 2023

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 5

M1 - 128

ER -

Refining the GENEVA method for Higgs boson production via gluon fusion

Abstract

Fördermittel

ÖFOS 2012

Zugriff auf Dokument

Andere Dateien und Links

Fingerprint

Zitationsweisen