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Full NLO QCD corrections to Higgs-pair production in the Standard Model and beyond
/ Baglio, Julien (CERN) ; Campanario, Francisco (Valencia U., IFIC ; Karlsruhe U., ITP) ; Glaus, Seraina (Karlsruhe U., ITP ; Karlsruhe U.) ; Mühlleitner, Milada Margarete (Karlsruhe U., ITP) ; Ronca, Jonathan (Valencia U., IFIC) ; Spira, Michael (PSI, Villigen)
Higgs-pair production is one of the targets of the high-luminosity LHC and of future hadron colliders, as it allows for a direct probe of the trilinear Higgs coupling and hence of the mechanism behind electroweak symmetry breaking. This contribution focuses on the impact of the full next- to-leading order QCD corrections to Higgs-pair production via gluon fusion, the main production mechanism at hadron colliders, in the Standard Model and in Two-Higgs-Doublet models. [...]
2022 - 5 p.
- Published in : PoS PANIC2021 (2022) 393
Fulltext: PDF;
In : 22nd Particles and Nuclei International Conference (PANIC 2021), Lisbon, Portugal, 5 - 10 Sep 2021, pp.393
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Pseudoscalar MSSM Higgs Production at NLO SUSY-QCD
/ Bagnaschi, Emanuele (CERN) ; Fritz, Lukas (PSI, Villigen ; Zurich U.) ; Liebler, Stefan (KIT, Karlsruhe, TP) ; Mühlleitner, Margarete (KIT, Karlsruhe, TP) ; Nguyen, Thanh Tien Dat (KIT, Karlsruhe, TP) ; Spira, Michael (PSI, Villigen)
One of the most important mechanisms at the Large Hadron Collider (LHC) for the production of the pseudoscalar Higgs boson of the Minimal Supersymmetric Standard Model (MSSM) is the loop-induced gluon fusion process $gg\to A$. The higher-order QCD corrections have been obtained a long time ago and turned out to be large. [...]
arXiv:2207.02807; CERN-TH-2022-100; KA-TP-16-22; PSI-PR-22-16; CERN--TH--2022--100; KA--TP--16--22; PSI--PR--22--16.-
2023-03-17 - 38 p.
- Published in : JHEP 2303 (2023) 124
Fulltext: 2207.02807 - PDF; document - PDF;
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Higgs couplings: constraints and sensitivity on Supersymmetry
/ Mahmoudi, Farvah (IP2I, Lyon ; CERN) ; Arbey, Alexandre (IP2I, Lyon ; CERN) ; Battaglia, Marco (UC, Santa Cruz) ; Djouadi, Abdelhak (Annecy, LAPTH ; NICPB, Tallinn) ; Mühlleitner, Margarete (KIT, Karlsruhe) ; Spira, Michael (PSI, Villigen)
The determination of the fundamental properties of the Higgs boson with sufficient accuracy has crucial implications for physics beyond the Standard Model. Here, we consider Supersymmetry and highlight the complementarity of the Higgs measurements and the superparticle searches at the LHC, based on the 8 and 13 TeV results, in probing its phenomenological minimal version, the pMSSM. [...]
SISSA, 2021 - 6 p.
- Published in : PoS ICHEP2020 (2021) 261
Fulltext: PDF;
In : 40th International Conference on High Energy Physics (ICHEP), Prague, Czech Republic, 28 Jul - 6 Aug 2020, pp.261
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NLO QCD corrections to Higgs boson pair production
/ Baglio, Julien (CERN) ; Campanario, Francisco (Valencia U., IFIC ; Karlsruhe U., ITP) ; Glaus, Seraina (Karlsruhe U., ITP ; KIT, Karlsruhe) ; Mühlleitner, Milada Margarete (KIT, Karlsruhe) ; Ronca, Jonathan (Valencia U., IFIC) ; Spira, Michael (PSI, Villigen)
In this contribution the next-to-leading (NLO) QCD corrections to Higgs boson pair production are discussed. A brief sketch of the calculation is given. [...]
SISSA, 2021 - 6 p.
- Published in : PoS LHCP2020 (2021) 131
Fulltext: PDF;
In : 8th Conference of Large Hadron Collider Physics (LHCP), Online, 25 - 30 May 2020, pp.131
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Higgs mass predictions of public NMSSM spectrum generators
/ Staub, Florian (CERN) ; Athron, Peter (Monash U.) ; Ellwanger, Ulrich (Orsay, LPT ; Southampton U.) ; Gröber, Ramona (INFN, Rome3) ; Mühlleitner, Margarete (KIT, Karlsruhe, TTP) ; Slavich, Pietro (UPMC, Paris (main) ; Paris, LPTHE) ; Voigt, Alexander (DESY)
The publicly available spectrum generators for the NMSSM often lead to different predictions for the mass of the standard model-like Higgs boson even if using the same renormalization scheme and two-loop accuracy. Depending on the parameter point, the differences can exceed 5 GeV, and even reach 8 GeV for moderate superparticle masses of up to 2 TeV. [...]
arXiv:1507.05093; CERN-PH-TH-2015-164; DESY-15-122; KA-TP-16-2015; LPT-ORSAY-15-54; COEPP-MN-15-8; RM3-TH-15-11; CERN-PH-TH-2015-164; DESY 15-122; KA-TP-16-2015; LPT-ORSAY-15-54; RM3-TH-15-11.-
Geneva Geneva : CERN, CERN, 2016-05 - 18 p.
- Published in : Comput. Phys. Commun. 202 (2016) 113-130
Fulltext: PDF; External link: Preprint
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eHDECAY: an Implementation of the Higgs Effective Lagrangian into HDECAY
/ Contino, Roberto (IPT, Lausanne ; CERN) ; Ghezzi, Margherita (Turin U. ; INFN, Turin ; Rome U. ; INFN, Rome) ; Grojean, Christophe (Barcelona, IFAE) ; Mühlleitner, Margarete (KIT, Karlsruhe) ; Spira, Michael (PSI, Villigen)
We present eHDECAY, a modified version of the program HDECAY which includes the full list of leading bosonic operators of the Higgs effective Lagrangian with a linear or non-linear realization of the electroweak symmetry and implements two benchmark composite Higgs models..
arXiv:1403.3381; CERN-PH-TH-2013-316; KA-TP-03-2014; PSI-PR-13-20; CERN-PH-TH-2013-316; KA-TP-03-2014; PSI-PR-13-20.-
2014-06-09 - 12 p.
- Published in : Comput. Phys. Commun. 185 (2014) 3412-3423
Fulltext: PDF; External link: Preprint
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Effective Lagrangian for a light Higgs-like scalar
/ Contino, Roberto (Rome U. ; INFN, Rome) ; Ghezzi, Margherita (Rome U. ; INFN, Rome) ; Grojean, Christophe (Barcelona, IFAE ; CERN) ; Muhlleitner, Margarete (KIT, Karlsruhe) ; Spira, Michael (PSI, Villigen)
We reconsider the effective Lagrangian that describes a light Higgs-like boson and better clarify a few issues which were not exhaustively addressed in the previous literature. In particular we highlight the strategy to determine whether the dynamics responsible for the electroweak symmetry breaking is weakly or strongly interacting. [...]
arXiv:1303.3876; CERN-PH-TH-2013-047; KA-TP-06-2013; PSI-PR-13-04; CERN-PH-TH-2013-047; KA-TP-06-2013; PSI-PR-13-04.-
2013 - 67 p.
- Published in : JHEP 07 (2013) 035
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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