Higgs-pair production via gluon fusion at hadron colliders: NLO QCD corrections

Autor: J. Streicher, Seraina Glaus, Michael Spira, Julien Baglio, Jonathan Ronca, Francisco Campanario, Margarete Mühlleitner
Přispěvatelé: Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Generalitat Valenciana
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of High Energy Physics, Vol 2020, Iss 4, Pp 1-50 (2020)
Digital.CSIC. Repositorio Institucional del CSIC
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Journal of high energy physics, 2020 (4), Article no: 181
Journal of High Energy Physics
ISSN: 1029-8479
1126-6708
1127-2236
DOI: 10.1007/JHEP04(2020)181
Popis: Higgs-pair production via gluon fusion is the dominant production mechanism of Higgs-boson pairs at hadron colliders. In this work, we present details of our numerical determination of the full next-to-leading-order (NLO) QCD corrections to the leading top-quark loops. Since gluon fusion is a loop-induced process at leading order, the NLO calculation requires the calculation of massive two-loop diagrams with up to four different mass/energy scales involved. With the current methods, this can only be done numerically, if no approximations are used. We discuss the setup and details of our numerical integration. This will be followed by a phenomenological analysis of the NLO corrections and their impact on the total cross section and the invariant Higgs-pair mass distribution. The last part of our work will be devoted to the determination of the residual theoretical uncertainties with special emphasis on the uncertainties originating from the scheme and scale dependence of the (virtual) top mass. The impact of the trilinear Higgs-coupling variation on the total cross section will be discussed.
The work of S. G. is supported by the Swiss National Science Foundation (SNF). The work of S. G. and M. M. is supported by the DFG Collaborative Research Center TRR 257 \Particle Physics Phenomenology after the Higgs Discovery". F. C. and J. R. acknowledge financial support by the Generalitat Valenciana, Spanish Government and ERDF funds from the European Commission (Grants No. RYC-2014-16061, SEJI-2017/2017/019, FPA2017-84543- P,FPA2017-84445-P, and SEV-2014-0398). We acknowledge support by the state of Baden-Württemberg through bwHPC and the German Research Foundation (DFG) through grant no INST 39/963-1 FUGG (bwForCluster NEMO).
Databáze: OpenAIRE
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