Springer : Full NLO QCD predictions for Higgs-pair production in the 2-Higgs-Doublet Model

Baglio, J.; Mühlleitner, M.; Campanario, F.; Glaus, S.; Spira, M.; Ronca, J.

doi:10.1140/epjc/s10052-023-11957-2

Article
Report number	arXiv:2303.05409 ; CERN-TH-2022-108 ; IFIC/23-08 ; KA-TP-02-2023 ; P3H-23-013 ; PSI-PR-23-6
Title	Full NLO QCD predictions for Higgs-pair production in the 2-Higgs-Doublet Model
Author(s)	Baglio, J. (CERN ; QuantumBasel) ; Campanario, F. (Valencia U. ; Valencia U., IFIC) ; Glaus, S. (KIT, Karlsruhe, TP ; KIT, Karlsruhe, IKP) ; Mühlleitner, M. (KIT, Karlsruhe, TP) ; Ronca, J. (Rome III U. ; INFN, Rome3) ; Spira, M. (PSI, Villigen)
Publication	2023-09-18
Imprint	2023-03-09
Number of pages	13
Note	13 pages, 10 figures. V2: minor typos corrected, identical to published version
In:	Eur. Phys. J. C 83 (2023) 826
DOI	10.1140/epjc/s10052-023-11957-2
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	After the discovery of the Higgs boson in 2012 at the CERN Large Hadron Collider (LHC), the study of its properties still leaves room for an extended Higgs sector with more than one Higgs boson. 2-Higgs Doublet Models (2HDMs) are well-motivated extensions of the Standard Model (SM) with five physical Higgs bosons: two CP-even states $h$ and $H$, one CP-odd state $A$, and two charged states $H^\pm_{}$. In this letter, we present the calculation of the full next-to-leading order (NLO) QCD corrections to $hH$ and $AA$ production at the LHC in the 2HDM at small values of the ratio of the vacuum expectation values, $\tan\beta$, including the exact top-mass dependence everywhere in the calculation. Using techniques applied in the NLO QCD SM Higgs pair production calculation, we present results for the total cross section as well as for the invariant Higgs-pair-mass distribution at the LHC. We also provide the top-quark scale and scheme uncertainties which are found to be sizeable.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2023-2024 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³

$\it Generic one-loop diagrams for LO Higgs-boson pair production via gluon fusion, $gg\to\phi_1^{}\phi_2^{}$, in the 2HDM type I. The contribution from triple Higgs couplings is marked in red. Note that $\phi_1^{}\phi_2^{} = hH$ or $AA$.$ $\it Generic two-loop diagrams for Higgs pair production via gluon fusion, $gg\to\phi_1^{}\phi_2^{}~(\phi_1 \phi_2 = hH, AA)$: {\it (i)} two-loop triangle diagrams, {\it (ii)} one-particle reducible diagrams, {\it (iii)} two-loop box diagrams.$ $Invariant Higgs-pair-mass distributions for Higgs boson pair production via gluon fusion at the 13 TeV LHC as a function of $Q$ using the {\tt PDF4LHC15} PDF set, in the 2HDM type I. Left: CP-even $hH$ production. Right: CP-odd $AA$ production. In both panels, the Born-improved HTL results (in blue), HTL results including the full real corrections (in yellow), HTL results including the full virtual corrections (in green, including the numerical error), and the full NLO QCD results (in red, including the numerical error) are depicted. The inserts below display the ratio to the NLO HTL result for the different calculations. The red band indicates the renormalisation and factorisation scale uncertainties for the results including the full NLO QCD corrections.$ Show more plots

Corresponding record in: Inspire

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Record created 2023-03-14, last modified 2024-05-23

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