NLO-QCD corrections to Higgs pair production in the MSSM

Agostini, Alessio; Degrassi, Giuseppe; Gröber, Ramona; Slavich, Pietro

doi:10.1007/jhep04(2016)106

Cited by 14 publications

(16 citation statements)

References 98 publications

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“…If the new degrees of freedom are very light, they can affect the Higgs-pair production process in different ways (like e.g. resonant production [53][54][55][56][57][58][59][60] or by scalar/fermionic contributions to the gluon fusion loop [61][62][63]) and the dominant effect does not need to be associated with the λ hhh coupling deviation. Hence, we focus on the case where the new physics is above the EW scale, but not necessarily yet in the EFT regime where the effects are expected to decouple rapidly.…”

Section: Uv Complete Modelsmentioning

confidence: 99%

Maxi-sizing the trilinear Higgs self-coupling: how large could it be?

2017

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In order to answer the question on how much the trilinear Higgs self-coupling could deviate from its Standard Model value in weakly coupled models, we study both theoretical and phenomenological constraints. As a first step, we discuss this question by modifying the Standard Model using effective operators. Considering constraints from vacuum stability and perturbativity, we show that only the latter can be reliably assessed in a model-independent way. We then focus on UV models which receive constraints from Higgs coupling measurements, electroweak precision tests, vacuum stability and perturbativity. We find that the interplay of current measurements with perturbativity already excludes selfcoupling modifications above a factor of a few with respect to the Standard Model value.

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Section: Uv Complete Modelsmentioning

confidence: 99%

Maxi-sizing the trilinear Higgs self-coupling: how large could it be?

2017

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“…For a precise determination of the accessibility of BSM effects in gluon fusion to a Higgs pair, the NLO QCD corrections are essential and need to be computed in the context of these models. They have been provided in the large loop particle mass limit for the singlet-extended SM [71], for the 2-Higgs-doublet model [60] and for the MSSM [10,77]. 4 In the same limit, the NLO QCD corrections including dimension-6 operators have been computed in [103].…”

Section: Jhep06(2016)080mentioning

confidence: 99%

Signs of composite Higgs pair production at next-to-leading order

Gröber

Mühlleitner

Spira

2016

J. High Energ. Phys.

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Abstract:In composite Higgs models the Higgs boson arises as a pseudo-Goldstone boson from a strongly-interacting sector. Fermion mass generation is possible through partial compositeness accompanied by the appearance of new heavy fermionic resonances. The Higgs couplings to the Standard Model (SM) particles and between the Higgs bosons themselves are modified with respect to the SM. Higgs pair production is sensitive to the trilinear Higgs self-coupling but also to anomalous couplings like the novel 2-Higgs-2-fermion coupling emerging in composite Higgs models. The QCD corrections to SM Higgs boson pair production are known to be large. In this paper we compute, in the limit of heavy loop particle masses, the next-to-leading order (NLO) QCD corrections to Higgs pair production in composite Higgs models without and with new heavy fermions. The relative QCD corrections are found to be almost insensitive both to the compositeness of the Higgs boson and to the details of the heavy fermion spectrum, since the leading order cross section dominantly factorizes. With the obtained results we investigate the question if, taking into account Higgs coupling constraints, new physics could first be seen in Higgs pair production. We find this to be the case in the high-luminosity option of the LHC for composite Higgs models with heavy fermions. We also investigate the invariant mass distributions at NLO QCD. While they are sensitive to the Higgs non-linearities and hence anomalous couplings, the influence of the heavy fermions is much less pronounced.

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“…Reference [11] also gives results for the NMSSM, which will however not be discussed here. Furthermore, NLO QCD corrections to Higgs pair production via gluon fusion to the singlet extension of the SM are given in ref.…”

Section: Higher Order Corrections To Beyond the Standard Model Higgs mentioning

confidence: 99%

“…In this section NLO QCD corrections to BSM Higgs pair production will be discussed: for the SM with effective dim 6 operators [10] in subsection 4.1 and the SUSY-QCD corrections in the MSSM [11] in subsection 4.2. Reference [11] also gives results for the NMSSM, which will however not be discussed here.…”

Section: Higher Order Corrections To Beyond the Standard Model Higgs mentioning

confidence: 99%

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Pair Production of Beyond the Standard Model Higgs Bosons

Gröber

2017

EPJ Web Conf.

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Abstract. Higgs pair production is not only sensitive to the trilinear Higgs self-coupling, but it can give access to other anomolous couplings, as e.g. a novel hhtt coupling. In Composite Higgs Models, this coupling usually leads to a large increase of the cross section. In such a framework an interesting question is, whether it might be possible to observe new physics for the first time in Higgs pair production. This question will be addressed by taking into account projected sensitivities for Higgs coupling measurements and for direct searches of new vector-like quarks. Higher order corrections to Higgs pair production via gluon fusion are sizeable. It is hence not only important to compute them in the Standard Model (SM) but also in its extensions. Here, the computation of the QCD corrections in the SM with dimension 6 operators as well as the SUSY-QCD corrections to Higgs pair production via gluon fusion in the MSSM are presented.

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NLO-QCD corrections to Higgs pair production in the MSSM

Cited by 14 publications

References 98 publications

Maxi-sizing the trilinear Higgs self-coupling: how large could it be?

Maxi-sizing the trilinear Higgs self-coupling: how large could it be?

Signs of composite Higgs pair production at next-to-leading order

Pair Production of Beyond the Standard Model Higgs Bosons

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