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arxiv: hep-ph/0504050 · v5 · submitted 2005-04-06 · ✦ hep-ph

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Basis-independent methods for the two-Higgs-doublet model

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classification ✦ hep-ph
keywords higgsbasis-independentmodelfieldsgeneralhdmsindependentlagrangian
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In the most general two-Higgs-doublet model (2HDM), unitary transformations between the two Higgs fields do not change the functional form of the Lagrangian. All physical observables of the model must therefore be independent of such transformations (i.e., independent of the Lagrangian basis choice for the Higgs fields). We exhibit a set of basis-independent quantities that determine all tree-level Higgs couplings and masses. Some examples of the basis-independent treatment of 2HDM discrete symmetries are presented. We also note that the ratio of the neutral Higgs field vacuum expectation values, tan(beta), is not a meaningful parameter in general, as it is basis-dependent. Implications for the more specialized 2HDMs (e.g., the Higgs sector of the MSSM and the so-called Type-I and Type-II 2HDMs) are explored.

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Cited by 4 Pith papers

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

  1. Probing Boosted Light Scalars in the Type-I 2HDM

    hep-ph 2026-05 conditional novelty 7.0

    Boosted light scalars decaying to b b-bar in Type-I 2HDM can be tagged as double-b fat-jets and used with SM gauge bosons to probe heavy scalars up to 540 GeV at the HL-LHC for masses 30-70 GeV.

  2. GOOFy fermions

    hep-ph 2026-04 unverdicted novelty 6.0

    New fermion transformations and all-order renormalization-invariant parameter regions are identified for two-Higgs-doublet models including scalar-fermion interactions.

  3. Possibility of Probing an Extra Higgs Boson at the Compact Linear Collider

    hep-ph 2026-05 unverdicted novelty 3.0

    CLIC can probe an additional neutral Higgs boson H in the Two Higgs Doublet Model through the process e+e- to H nu nu-bar with H decaying to WW in the dilepton channel.

  4. Comprehensive analyses of rare $ \Lambda_b \rightarrow \Lambda \ell^+ \ell^-$, $\Sigma_b \rightarrow \Sigma \ell^+ \ell^-$ and $\Xi_b \rightarrow \Xi \ell^+ \ell^-$ decays in 2HDM

    hep-ph 2026-04 unverdicted novelty 3.0

    The work computes differential and total branching ratios plus forward-backward asymmetries for Λ_b → Λ ℓ⁺ℓ⁻, Σ_b → Σ ℓ⁺ℓ⁻ and Ξ_b → Ξ ℓ⁺ℓ⁻ in 2HDM Type III and contrasts them with SM predictions.