CP violating Two-Higgs-Doublet Model: constraints and LHC predictions

Keus, Venus; King, Stephen F.; Moretti, Stefano; Yagyu, Kei

doi:10.1007/jhep04(2016)048

Cited by 28 publications

(24 citation statements)

References 59 publications

(84 reference statements)

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“…For example, in the two Higgs Doublet Model (HDM) (for a recent analysis see e.g. [94]) a CP odd invariant was identified in [95]. More generally, applying the invariant approach to scalar potentials has revealed relevant CPIs [96][97][98], including for the 2HDM [99,100].…”

Section: Charged Lepton Sectormentioning

confidence: 99%

Unified models of neutrinos, flavour andCPViolation

King

2017

Progress in Particle and Nuclear Physics

227

164

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Recent data from neutrino experiments gives intriguing hints about the mass ordering, the CP violating phase and non-maximal atmospheric mixing. There seems to be a (one sigma) preference for a normal ordered (NO) neutrino mass pattern, with a CP phase δ = −100 • ± 50 • , and (more significantly) non-maximal atmospheric mixing. Global fits for the NO case yield lepton mixing angle one sigma ranges:Cosmology gives a limit on the total of the three masses to be below about 0.23 eV, favouring hierarchical neutrino masses over quasi-degenerate masses. Given such experimental advances, it seems an opportune moment to review the theoretical status of attempts to explain such a pattern of neutrino masses and lepton mixing, focussing on approaches based on the four pillars of: predictivity, minimality, robustness and unification. Predictivity can result from various mixing sum rules whose status is reviewed. Minimality can follow from the type I seesaw mechanism, including constrained sequential dominance of right-handed (RH) neutrinos, and the littlest seesaw model. Robustness requires enforcing a discrete CP and non-Abelian family symmetry, spontaneously broken by flavons with the symmetry preserved in a semi-direct way. Unification can account for all lepton and quark masses, mixing angles and CP phases, as in Supersymmetric Grand Unified Theories of Flavour, with possible string theory origin.

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Section: Charged Lepton Sectormentioning

confidence: 99%

Unified models of neutrinos, flavour andCPViolation

King

2017

Progress in Particle and Nuclear Physics

227

164

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“…We expect that the smaller the amount of the explicit CP violation is, the longer the lifetime of the wall-like object is. Since the amount of the CP violation is constrained by various phenomenological requirements, such as electric dipole moment measurements (see, e.g., [30] and references therein), it is interesting to ask whether we can exclude a part of parameter space of 2HDMs by combining cosmological requirement with those phenomenological constraints. For such a study, quantitatively reliable estimate of the lifetime of wall-like objects is necessary.…”

Section: Cosmological Constraint On the U (1)a Breaking Parametersmentioning

confidence: 99%

Constraints on two Higgs doublet models from domain walls

2018

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We show that there is a constraint on the parameter space of two Higgs doublet models that comes from the existence of the stable vortex-domain wall systems. The constraint is quite universal in the sense that it depends on only two combinations of Lagrangian parameters and, at tree level, does not depend on how fermions couple to two Higgs fields. Numerical solutions of field configurations of domain wall-vortex system are obtained, which provide a basis for further quantitative study of cosmology which involve such topological objects. arXiv:1803.04662v3 [hep-ph] 13 Sep 20181 Since the fermion sector breaks the CP symmetry, even if we take m 2 12 and β 5 to be real values, fermion loop contributions renormalize these parameters to be complex numbers. We will discuss the effect of explicit CP breaking terms in Sec. VI. 2 In the literature, it is often expressed as Φ 1 = e −iζ (0, v 1 ) T , Φ 2 = (0, v 2 ) T , or Φ 1 = (0, v 1 ) T , Φ 2 = e iζ (0, v 2 ) T . These are equivalent to Eq. (4) with α = ζ/2 up to gauge transformation.

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“…In this work, we aim to investigate the observability of a 2HDM at the present [12][13][14][15][16][17][18][19][20] and upcoming colliders [21,22] within the parameter region that allows for high-scale validity (including both vacuum stability and perturbativity). This could turn challenging since the search prospects could be severely inhibited by the constraints.…”

Section: Introductionmentioning

confidence: 99%

High-scale validity of a two-Higgs-doublet scenario: Predicting collider signals

Chakrabarty

Mukhopadhyaya

2017

Phys. Rev. D

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It is possible to ameliorate the Higgs vacuum stability problem by switching over to two Higgs doublet models (2HDM), ensuring a stable electroweak vacuum up to the Planck scale, even though the top quark mass may be on the high side. However, the simultaneous requirements of perturbative unitarity, and also compatibility with collider and flavour data, constrain the parameter space severely.We investigate the collider signals answering to the regions allowed by such constraints. In particular, the near degeneracy of the neutral heavy scalar and the pseudoscalar is a feature that is probed. The LHC allows distinguishability of these two states, together with signal significance of at least 3σ, in its high-luminosity run. While e + e − colliders may have rather low event rates, muon colliders, cashing on the principle of radiative return, can probe 2HDM scenarios with (pseudo)scalar masses up to a TeV or so, though with the price of losing distinction between the CP-even and odd states.

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CP violating Two-Higgs-Doublet Model: constraints and LHC predictions

Cited by 28 publications

References 59 publications

Unified models of neutrinos, flavour andCPViolation

Unified models of neutrinos, flavour andCPViolation

Constraints on two Higgs doublet models from domain walls

High-scale validity of a two-Higgs-doublet scenario: Predicting collider signals

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