CDF $W$ boson mass and muon $g-2$ in type-X two-Higgs-doublet model with a Higgs-phobic light pseudoscalar

Kim, Jinheung; Lee, Soojin; Sanyal, Prasenjit; Song, Jeonghyeon

doi:10.48550/arxiv.2205.01701

Cited by 3 publications

(3 citation statements)

References 68 publications

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“…Moreover, the new observation has a 7σ deviation from the SM prediction m W = 80.361 GeV [74]. If the W -mass anomaly is confirmed by the measurements at the LHC with more cumulative data, it would be a solid piece of evidence that exhibits the effects of new physics [75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92].…”

Section: Introductionmentioning

confidence: 65%

Top-quark FCNC decays, LFVs, lepton $g-2$, and $W$ mass anomaly with inert charged Higgses

Chen¹,

Chiang²,

Su³

2023

Preprint

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The observed flavor-changing neutral-current (FCNC) processes in the standard model (SM) arise from the loop diagrams involving the weak charged currents mediated by the W -gauge boson.Nevertheless, the top-quark FCNCs and lepton-flavor violating processes resulting from the same mechanism are highly suppressed. We investigate possible new physics effects that can enhance the suppressed FCNC processes, such as t → q(h, V ) with V = γ, Z, g, h →, and → γ.To achieve the assumption that the induced-FCNCs are all from quantum loops, we consider the scotogenic mechanism, where a Z 2 symmetry is introduced and only new particles carry an odd Z 2 parity. With the extension of the SM to include an inert Higgs doublet, an inert charged Higgs singlet, a vector-like singlet quark, and two neutral leptons, it is found that, with relevant constraints taken into account, the t → c(h, Z), h → µτ , and τ → γ decays can be enhanced up to the expected sensitivities in experiments. The branching ratios of h → µ + µ − /τ + τ − from only new physics effects can reach up to O(10 −3 ). Intriguingly, the resulting muon g − 2 can fit the combined data within 2σ errors, whereas the electron g − 2 can have either sign with a magnitude of O(10 −13 − 10 −12 ). In addition, we examine the oblique parameters in the model and find that the resulting W -mass anomaly observed by CDF II can be accommodated.

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Section: Introductionmentioning

confidence: 65%

Top-quark FCNC decays, LFVs, lepton $g-2$, and $W$ mass anomaly with inert charged Higgses

Chen¹,

Chiang²,

Su³

2023

Preprint

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“…This is a significant indication of new physics beyond the SM (BSM). A lot of efforts have been made to provide an explanation for this tantalizing excess, such as singlet scalar model [3][4][5][6], Two-Higgs Doublet model [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], triplet scalar model [26][27][28][29][30][31][32][33][34][35][36][37][38][39], new fermion [40][41][42][43][44][45][46][47][48][49][50][51], new gauge boson [52]…”

Section: Introductionmentioning

confidence: 99%

Electroweak precision tests for triplet scalars

Yu¹,

He²,

Huang³

et al. 2022

Preprint

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Electroweak precision observables are fundamentally important for testing the standard model (SM) or its extensions. The influences to observables from new physics within the electroweak sector can be expressed in terms of oblique parameters S, T, U. The recently reported W mass excess anomaly by CDF modifies these parameters in a significant way. By performing the global fit with the CDF new W mass measurement data, we obtain S = 0.03 ± 0.03, T = 0.06 ± 0.02 and U = 0.16 ± 0.03 (or S = 0.14 ± 0.03, T = 0.24 ± 0.02 with U = 0) which is significantly away from zero as SM would predict. The CDF excess strongly indicates the need of new physics beyond SM. We carry out a global fit to study the influence of two different cases of simple extensions by a hyper-charge Y = 1 triplet scalar ∆ (corresponding to the type-II seesaw model) and a Y = 0 real triplet scalar Σ on electroweak precision tests to determine parameter space in these models to solve the W mass anomaly and discuss the implications. We find that these triplets can affect the oblique parameters significantly at the tree and loop levels. For Y = 1 case, there are seven new scalars in the model. The tree and scalar loop effects on oblique parameters can be expressed in terms of three parameters, the neutral CP-even mass mH , potential parameter λ4 and triplet vev v∆. Our global fit obtains mH = 296.02 ± 10.18 GeV, λ4 = 2.58 ± 0.09 and v∆ = 4.82 ± 0.34 GeV. These parameter correspondingly results in mass difference ∆m 2 = (197.49 ± 3.45GeV) 2 . Using these fit values, we further obtain m H ++ = 98.09 ± 20.02GeV, which satisfies the current LHC constraints. We also further adopt the phenomenological analysis, such as vacuum stability and perturbative unitarity, Higgs data and triple Higgs self-coupling. Furthermore, we find that the future lepton colliders can feasibly search for doubly charged H ++ via pair production H ++ H −− and decay channel to four W final states. For Y = 0 case, there are four new scalars in the model. The tree and new scalar effects on the oblique parameters can be parameterized by the singly charged mass m H + , the mass difference ∆m = m H + − m H 0 and triplet vev vΣ. Our global fit obtains m H + = 77.16 ± 17.12 GeV, ∆m = −14.27 ± 4.22 GeV and vΣ = 3.20 ± 0.30 GeV. However, these strongly violate the perturbative unitarity of the potential parameter b4, which can only be satisfied within 3σ errors.

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“…The authors in Refs. [28][29][30][31][32][33][34][35][36][37][38] have attempted to provide a common explanation for both muon (g − 2) and W-boson mass anomaly.…”

Section: Introductionmentioning

confidence: 99%

Muon ($g-2$) and W-boson mass Anomaly in a Model Based on $Z_4$ Symmetry with Vector like Fermion

Arora¹,

Kashav²,

Verma³

et al. 2022

Preprint

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The latest results of CDF-II collaboration show a discrepancy of 7σ with standard model expectations. There is, also, a 4.2σ discrepancy in the measurement of muon magnetic moment reported by Fermilab. We study the connection between neutrino masses, dark matter, muon (g − 2) and W-boson mass anomaly within a single coherent framework based on Z 4 extension of the scotogenic model with vector like lepton (VLL). Neutrino masses are generated at one loop level. The inert doublet, also, provide a solution to W-boson mass anomaly through correction in oblique parameters S, T and U . The coupling of VLL triplet ψ T to inert doublet η provides positive contribution to muon anomalous magnetic moment. In the model, the VLL triplet provides a lepton portal to dark matter (η 0 R ). The model predicts a lower bound m ee > 0.025 eV at 3σ, which is well within the sensitivity reach of the 0νββ decay experiments. The model explains muon anomalous magnetic moment ∆a µ for 1.3 < y ψ < 2.8 and mass of DM candidate in the range 152 GeV < M η 0 R < 195 GeV. The explanation of W-boson mass anomaly, further, constrain the mass of DM candidate, M η 0 R , in the range 154 GeV < M η 0 R < 174 GeV.

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CDF $W$ boson mass and muon $g-2$ in type-X two-Higgs-doublet model with a Higgs-phobic light pseudoscalar

Cited by 3 publications

References 68 publications

Top-quark FCNC decays, LFVs, lepton $g-2$, and $W$ mass anomaly with inert charged Higgses

Top-quark FCNC decays, LFVs, lepton $g-2$, and $W$ mass anomaly with inert charged Higgses

Electroweak precision tests for triplet scalars

Muon ($g-2$) and W-boson mass Anomaly in a Model Based on $Z_4$ Symmetry with Vector like Fermion

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