Natural flavor conservation in Higgs induced neutral currents and the quark mixing angles

Gatto, R.; Morchio, G.; Sartori, G.; Strocchi, Franco

doi:10.1016/0550-3213(80)90399-5

Cited by 49 publications

(29 citation statements)

References 23 publications

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“…(24), we see that there are FCNCs in all of the quark sectors, as neither of the sets fΓ i Γ † j g, fΓ † i Γ j g, fΔ i Δ † j g, and fΔ † i Δ j g are Abelian (proof given in Ref. [46]). Nevertheless, the small number of free parameters allows us to extract some additional information.…”

Section: Model M2mentioning

confidence: 86%

Classification of anomaly-free 2HDMs with a gauged U(1)′ symmetry

Nottensteiner¹,

Ordell²,

Pasechnik³

et al. 2019

Phys. Rev. D

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Two-Higgs-doublet models (2HDMs) with a flavored Uð1Þ 0 gauge symmetry are a popular extension to the Standard Model (SM), yet they currently lack a complete survey. In this paper, we present a full classification of anomaly-free 2HDMs within the SM fermion content, resulting in a total of 11 distinct models. Four of these are relatively well studied, while the rest either partially, or entirely, lack previous treatment. We study these textures under a variety of experimental bounds, focusing mainly on the previously unexplored models. This work is intended to act as a catalog to models worth considering in greater detail.

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Section: Model M2mentioning

confidence: 86%

Classification of anomaly-free 2HDMs with a gauged U(1)′ symmetry

Nottensteiner¹,

Ordell²,

Pasechnik³

et al. 2019

Phys. Rev. D

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“…The first attempt was, naturally, to stick to the attractive NFC hypothesis and devise a model with the Cabibbo mixing angle calculable in terms of mass ratios. Gatto and collaborators showed that to be impossible within the SU (2) L × U (1) Y gauge group [90], even if one applies NFC after electroweak symmetry breaking [91]. The models were too rigid: whenever they predicted the Cabibbo angle, its value was fixed by the symmetry itself, independent of the quark mass ratios, and was off by far from the experimental result.…”

Section: Historical Excursionmentioning

confidence: 99%

Building and testing models with extended Higgs sectors

Иванов

2017

Progress in Particle and Nuclear Physics

153

162

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Models with non-minimal Higgs sectors represent a mainstream direction in theoretical exploration of physics opportunities beyond the Standard Model. Extended scalar sectors help alleviate difficulties of the Standard Model and lead to a rich spectrum of characteristic collider signatures and astroparticle consequences. In this review, we introduce the reader to the world of extended Higgs sectors. Not pretending to exhaustively cover the entire body of literature, we walk through a selection of the most popular examples: the two-and multi-Higgs-doublet models, as well as singlet and triplet extensions. We will show how one typically builds models with extended Higgs sectors, describe the main goals and the challenges which arise on the way, and mention some methods to overcome them. We will also describe how such models can be tested, what are the key observables one focuses on, and illustrate the general strategy with a subjective selection of results.

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“…The necessary and sufficient conditions obeyed by the quark Yukawa coupling matrices Γ α , Δ α , α ¼ 1, 2, in order to have gFC [42][43][44][45], are that each of the sets…”

Section: General Flavor Conservationmentioning

confidence: 99%

“…[40,41]. The general conditions for the absence of FCNCs, that is, that the mass matrix and the remaining Yukawa matrix can be diagonalized simultaneously, were identified early [42][43][44][45]. References [42,[46][47][48][49][50][51][52][53] addressed the interplay of how a symmetry requirement could enforce that general NFC and shed some light onto the structure of the resulting Cabibbo-Kobayashi-Maskawa (CKM) matrix.…”

Section: Introductionmentioning

confidence: 99%

Flavor conservation in two-Higgs-doublet models

Botella

Cornet-Gomez

Nebot³

2018

Phys. Rev. D

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In extensions of the Standard Model with two Higgs doublets, flavor-changing Yukawa couplings of the neutral scalars may be present at tree level. In this work, we consider the most general scenario in which those flavor-changing couplings are absent. We revise the conditions that the Yukawa coupling matrices must obey for such general flavour conservation (gFC) and study the one-loop renormalization group evolution of such conditions in both the quark and lepton sectors. We show that gFC in the leptonic sector is one-loop stable under the renormalization group evolution, and in the quark sector, we present some new Cabibbo-like solution also one-loop stable under renormalization group evolution. At a phenomenological level, we obtain the regions for the different gFC parameters that are allowed by the existing experimental constraints related to the 125 GeV Higgs.

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Natural flavor conservation in Higgs induced neutral currents and the quark mixing angles

Cited by 49 publications

References 23 publications

Classification of anomaly-free 2HDMs with a gauged U(1)′ symmetry

Classification of anomaly-free 2HDMs with a gauged U(1)′ symmetry

Building and testing models with extended Higgs sectors

Flavor conservation in two-Higgs-doublet models

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