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Yukawa Alignment in a Multi Higgs Doublet Model: An effective approach

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arxiv 1104.2545 v1 pith:CH34LTC6 submitted 2011-04-13 hep-ph

classification hep-ph
keywords alignmentmodelscalarsyukawafermionshiggssectorconservation
verification ladder T0 review T1 audit T2 compute T3 formal
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In the two Higgs doublet model, natural flavour conservation can be achieved through the use of a discrete Z2 symmetry. A less restrictive condition is the requirement of alignment in the Yukawa sector. So far, alignment has been an anzatz, not rooted in a specific model. In this letter we present a model for alignment, which starts with 2+N Higgs doublets, with natural flavour conservation imposed by a discrete symmetry. Only two of these scalars couple to the fermions, the other N scalars are in a hidden sector. Assuming that the two scalar doublets coupled to fermions are heavy, their decoupling leads to an effective Yukawa interaction. The latter connects the fermions and the scalars of the hidden sector, and exhibits the same Yukawa coupling matrix for each of the N scalars.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Correlating Resonant Di-Higgs and Tri-Higgs Production to $H\to VV$ in the 2HDM

    hep-ph 2025-12 conditional novelty 6.0 of 10

    In the decoupling limit of the 2HDM, a heavy Higgs boson's decays to two Higgs bosons and to Z/W pairs are predicted to have a fixed ratio of about 9.5, independent of Yukawa and scalar-potential parameters.

  2. Correlating $A \to \gamma\gamma$ with electric dipole moments in the two Higgs doublet model in light of the diphoton excesses at 95 GeV and 152 GeV

    hep-ph 2024-11 conditional novelty 6.0 of 10

    The CP-odd scalar A in the flavor-aligned CP-violating 2HDM can explain the diphoton excesses at 95 and 152 GeV only in tuned regions that survive the electron EDM bound and predict measurable neutron and proton EDMs.

  3. FCNC-free multi-Higgs-doublet models from broken family symmetries

    hep-ph 2019-08 conditional novelty 5.0 of 10

    Residual flavor symmetries enforce simultaneously diagonal Yukawa couplings across all Higgs doublets when they fully control fermion mixing, yielding a generalized Yukawa Alignment that is free of tree-level FCNC.

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