Symmetry and decoupling in multi-Higgs boson models

Carrolo, Sergio; Romão, Jorge C.; Silva, Joao; Vazão, Francisco

doi:10.1103/physrevd.103.075026

Cited by 12 publications

(8 citation statements)

References 21 publications

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“…By relaxing the alignment assumption, one can obtain many more viable points within the CP4 3HDM. Although there are indications that the true decoupling regime cannot be achieved within the spontaneously broken CP4 3HDM [47], one can still hope to generate benchmark models with heavier additional scalars which satisfy all present collider constraints. There remains much to explore within the CP4 3HDM.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, this particular version of the model does not possess the decoupling limit [46] (in fact, the results of Ref. [47] indicate that a spontaneously broken CP4 3HDM cannot possess this limit). Even more impressive, almost all parameter space points emerging from the numerical scan of Reference [30] contained one or two charged Higgses lighter than the top quark.…”

Section: Cp4 3hdm Scalar Sectormentioning

confidence: 94%

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Constraining CP4 3HDM with Top Quark Decays

Иванов

Obodenko

2021

Universe

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CP4 3HDM is a unique three-Higgs-doublet model equipped with a higher-order CP-symmetry in the scalar and Yukawa sector. Based on a single assumption (the minimal model with a CP-symmetry of order 4 and no accidental symmetry), it leads to a remarkable correlation between its scalar and Yukawa sectors, which echoes in its phenomenology. A recent scan of the parameter space of CP4 3HDM under the assumption of scalar alignment identified a few dozens of points which passed many flavor constraints. In the present work, however, we show that almost all of these points are now ruled out by the recent LHC searches of t→H+b with subsequent hadronic decays of H+. Apart from a few points with charged Higgses heavier than the top quark, only one point survives all the checks, the model with an exotic, non-2HDM-like generation pattern of H+ couplings with quarks. One can expect many more points with exotic H+ couplings to quarks if the scalar alignment assumption is relaxed.

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Section: Discussionmentioning

confidence: 99%

Section: Cp4 3hdm Scalar Sectormentioning

confidence: 94%

Constraining CP4 3HDM with Top Quark Decays

Иванов

Obodenko

2021

Universe

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“…By relaxing the alignment assumption, one can obtain many more viable points within the CP4 3HDM. Although there are indications that the true decoupling regime cannot be achieved within the spontaneously broken CP4 3HDM [44], one can still hope to generate benchmark models with heavier additional scalars which satisfy all present collider constraints. There remains much to explore within the CP4 3HDM.…”

Section: Discussionmentioning

confidence: 99%

“…A particular feature which emerged from the numerical scan of [26] was that the additional Higgses turned out rather light, with the masses of few hundred GeV. Thus, this particular version of the model does not possess the decoupling limit [43] (in fact, the results of [44] indicate that a spontaneously broken CP4 3HDM cannot possess this limit). Even more impressive, almost all parameter space points emerging from the numerical scan of [26] contained one or two charged Higgses lighter than the top quark.…”

Section: Cp4 3hdm Scalar Sectormentioning

confidence: 99%

Constraining CP4 3HDM with top quark decays

Иванов¹,

Obodenko²

2021

Preprint

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CP4 3HDM is a unique three-Higgs-doublet model equipped with a higher-order CP symmetry in the scalar and Yukawa sector. Based on a single assumption (the minimal model with a CP -symmetry of order 4 and no accidental symmetry), it leads to a remarkable correlation between its scalar and Yukawa sectors, which echoes in its phenomenology. A recent scan of the parameter space of CP4 3HDM under the assumption of scalar alignment identified a few dozens of points which passed many flavour constraints. In the present work we show, however, that almost all of these points are now ruled out by the recent LHC searches of t → H + b with subsequent hadronic decays of H + . Apart from a few points with charged Higgses heavier than the top quark, only one point survives all the checks, the model with an exotic, non-2HDMlike generation pattern of H + couplings with quarks. One can expect many more points with exotic H + couplings to quarks if the scalar alignment assumption is relaxed.

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“…Furthermore, it should also be noted that low values of the VEVs, especially v 12 ∼ O (1 GeV), will not necessarily imply the existence of light nonstandard scalars if we include terms that softly break the D 4 symmetry in the scalar potential [25][26][27] (please refer to the appendix A for details). A detailed study of the scalar potential along with the analysis of the flavor constraints is reserved for a future work.…”

mentioning

confidence: 99%

Diluting quark flavor hierarchies using dihedral symmetry

2022

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We present a $$D_4$$ D 4 flavored extension of the SM which provides an intuitive reasoning for the masses and mixing patterns in the quark sector. In our model, the Cabibbo mixing angle becomes related to the ratio of two vacuum expectation values. In fact, the orders of magnitude of the CKM matrix elements are readily obtained from the hierarchical nature of the vacuum expectation values. Moreover, we also show that the smallness of the off-Cabibbo elements in the CKM matrix is strongly connected to the heaviness of the third generation of quarks.

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Symmetry and decoupling in multi-Higgs boson models

Cited by 12 publications

References 21 publications

Constraining CP4 3HDM with Top Quark Decays

Constraining CP4 3HDM with Top Quark Decays

Constraining CP4 3HDM with top quark decays

Diluting quark flavor hierarchies using dihedral symmetry

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