Electroweak baryogenesis and the Higgs boson mass problem

Bochkarev, A.I.; Kuzmin, S. V.; Shaposhnikov, Mikhail

doi:10.1016/0370-2693(90)90069-i

Cited by 173 publications

(141 citation statements)

References 15 publications

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“…Their contributions to the effective Higgs potential can strengthen the PT and in addition introduce new sources of CP violation. Previous studies have shown that 2HDMs provide a good framework for successful baryogenesis [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] (see [48][49][50][51][52] for studies in the CP-violating 2HDM).…”

Section: Jhep02(2017)121mentioning

confidence: 99%

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Basler

Krause

Mühlleitner

et al. 2017

J. High Energ. Phys.

171

167

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The discovery of the Higgs boson by the LHC experiments ATLAS and CMS has marked a milestone for particle physics. Yet, there are still many open questions that cannot be answered within the Standard Model (SM). For example, the generation of the observed matter-antimatter asymmetry in the universe through baryogenesis can only be explained qualitatively in the SM. A simple extension of the SM compatible with the current theoretical and experimental constraints is given by the 2-Higgs-Doublet Model (2HDM) where a second Higgs doublet is added to the Higgs sector. We investigate the possibility of a strong first order electroweak phase transition in the CP-conserving 2HDM type I and type II where either of the CP-even Higgs bosons is identified with the SM-like Higgs boson. The renormalisation that we apply on the loop-corrected Higgs potential allows us to efficiently scan the 2HDM parameter space and simultaneously take into account all relevant theoretical and up-to-date experimental constraints. The 2HDM parameter regions found to be compatible with the applied constraints and a strong electroweak phase transition are analysed systematically. Our results show that there is a strong interplay between the requirement of a strong phase transition and collider phenomenology with testable implications for searches at the LHC.

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Section: Jhep02(2017)121mentioning

confidence: 99%

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Basler

Krause

Mühlleitner

et al. 2017

J. High Energ. Phys.

171

167

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“…is the SU(2) H (U(1) X ) gauge coupling constant, and 16) in which T a = τ a /2 (τ a are the Pauli matrices acting on the SU(2) H space),…”

Section: Jhep04(2016)019mentioning

confidence: 99%

“…In this analysis, we stick to the scan range of the parameters displayed in eq. (4.1) with slight modification as follows 0.12 16) and also demand the mixing (denoted by O D ) between H 0 2 and the other scalars to be less than 1%. In the exact IHDM limit, O D should be 1.…”

Section: Dark Matter Relic Densitymentioning

confidence: 99%

G2HDM: Gauged Two Higgs Doublet Model

Huang

Tsai

Yuan

2016

J. High Energ. Phys.

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A novel model embedding the two Higgs doublets in the popular two Higgs doublet models into a doublet of a non-abelian gauge group SU(2) H is presented. The Standard Model SU(2) L right-handed fermion singlets are paired up with new heavy fermions to form SU(2) H doublets, while SU(2) L left-handed fermion doublets are singlets under SU(2) H . Distinctive features of this anomaly-free model are: (1) Electroweak symmetry breaking is induced from spontaneous symmetry breaking of SU(2) H via its triplet vacuum expectation value; (2) One of the Higgs doublet can be inert, with its neutral component being a dark matter candidate as protected by the SU(2) H gauge symmetry instead of a discrete Z 2 symmetry in the usual case; (3) Unlike Left-Right Symmetric Models, the complex gauge fields (W 1 ∓ iW 2 ) (along with other complex scalar fields) associated with the SU(2) H do not carry electric charges, while the third component W 3 can mix with the hypercharge U(1) Y gauge field and the third component of SU(2) L ; (4) Absence of tree level flavour changing neutral current is guaranteed by gauge symmetry; and etc. In this work, we concentrate on the mass spectra of scalar and gauge bosons in the model. Constraints from previous Z data at LEP and the Large Hadron Collider measurements of the Standard Model Higgs mass, its partial widths of γγ and Zγ modes are discussed.

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“…It is clear that for too heavy H ± and A 0 the electroweak symmetry breaking minimum of V (1L) eff becomes metastable because while still remaining a local minimum, it becomes higher than the minimum at v 1 = 0. With two doublets it is however also possible that the full one-loop T = 0 potential develops other deeper minima and this is indeed what happens: as the masses of the H ± and A 0 particles grow (remaining almost degenerate) for fixed value of λ 345 a new minimum of V (1L) eff appears along the direction v 2 = 0, v 1 = 0 and, above some critical value 6 Some constraints on λ 2 follow from the DM relic density [19]. of M A 0 ≈ M H ± , it becomes deeper than the minimum at v 1 = v tree , v 2 = 0 whose existence -at least as a local one -is enforced by our renormalization condition.…”

Section: Parameters Of the Idmmentioning

confidence: 99%

Inert dark matter and strong electroweak phase transition

2012

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The main virtue of the Inert Doublet Model (IDM) is that one of its spinless neutral bosons can play the role of Dark Matter. Assuming that the additional sources of CP violation are present in the form of higher dimensional operator(s) we reexamine the possibility that the model parameters for which the right number density of relic particles is predicted are compatible with the first order phase transition that could lead to electroweak baryogenesis.We find, taking into account recent indications from the LHC and the constraints from the electroweak precision data, that for a light DM (40-60 GeV) particle H 0 and heavy, almost degenerate additional scalars H ± and A 0 this is indeed possible but the two parameters most important for the strength of the phase transition: the common mass of H ± and A 0 and the trilinear coupling of the Higgs-like particle h 0 to DM are strongly constrained. H ± and A 0 must weight less than ∼ 440 GeV if the inert minimum is to be the lowest one and the value of the h 0 H 0 H 0 coupling is limited by the XENON 100 data. We stress the important role of the zero temperature part of the potential for the strength of the phase transition.PACS numbers:12.60. Fr, 12.15.Ji, 98.80.Cq, 95.35.+d

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Electroweak baryogenesis and the Higgs boson mass problem

Cited by 173 publications

References 15 publications

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

Strong first order electroweak phase transition in the CP-conserving 2HDM revisited

G2HDM: Gauged Two Higgs Doublet Model

Inert dark matter and strong electroweak phase transition

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