Can the Higgs sector contribute significantly to the muon anomalous magnetic moment?

Abstract:We discuss the Type-X (lepton-specific) two Higgs doublet model as a solution of the anomaly of the muon g − 2. We consider various experimental constraints on the parameter space such as direct searches for extra Higgs bosons at the LEP II and the LHC Run-I, electroweak precision observables, the decay of B s → µ + µ − , and the leptonic decay of the tau lepton. We find that the measurement of the tau decay provides the most important constraint, which excludes the parameter region that can explain the muon g − 2 anomaly at the 1σ level. We then discuss the phenomenology of extra Higgs bosons and the standard model-like Higgs boson (h) to probe the scenario favored by the g − 2 data at the collider experiments. We find that the 4τ , 3τ and 4τ + W/Z signatures are expected as the main signal of the extra Higgs bosons at the LHC. In addition, we clarify that the value of the hτ τ coupling is predicted to be the standard model value times about −1.6 to −1.0, and the branching fraction of the h → γγ mode deviates from the standard model prediction by −30% to −15%. Furthermore, we find that the exotic decay mode, h decaying into the Z boson and a light CP-odd scalar boson, is allowed, and its branching fraction can be a few percent. These deviations in the property of h will be tested by the precision measurements at future collider experiments.

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“…In the early 2000s, this was calculated at the one-loop level in the Type-II 2HDM in ref. [12]. After that, it was pointed out in refs.…”

Section: Introductionmentioning

confidence: 95%

“…The muon g−2 has been calculated in a number of papers within 2HDMs [12][13][14][15][16][17][18][19][20][21][22]. In the early 2000s, this was calculated at the one-loop level in the Type-II 2HDM in ref.…”

Section: Introductionmentioning

confidence: 99%

Lepton-specific two Higgs doublet model as a solution of muon g − 2 anomaly

Abe

Sato

Yagyu

2015

J. High Energ. Phys.

106

109

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“…The contributions are sizeable only for large values of tan β for which the Φµ + µ − and H + µν µ couplings are enhanced; for a recent analysis see Ref. [33].…”

Section: Indirect Constraints From Precision Datamentioning

confidence: 99%

Minimal supersymmetric standard model Higgs bosons in the intense-coupling regime

et al. 2002

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We perform a comprehensive study of the Higgs sector of the Minimal Supersymmetric extension of the Standard Model in the case where all Higgs bosons are rather light, with masses of O(100 GeV), and couple maximally to electroweak gauge bosons and strongly to standard third generation fermions, i.e. for large values of the ratio of the vacuum expectation values of the two Higgs doublet fields, tan β. We first summarize the main phenomenological features of this "intense-coupling" scenario and discuss the available constraints from direct searches of Higgs bosons at LEP2 and the Tevatron as well as the indirect constraints from precision measurements such as the ρ parameter, the Zbb vertex, the muon (g − 2) and the decay b → sγ. We then analyze the decay branching fractions of the neutral Higgs particles in this regime and their production cross sections at the upcoming colliders, the Tevatron Run II, the LHC, a 500 GeV e + e − linear collider (in the e + e − and γγ options) as well as at a µ + µ − collider.

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“…After the BNL announcement, many studies have been made in the context of 2HDM Type II [8][9][10][11][12][13][14] and X [15]. It has been known that the discrepancy in the muon g − 2 can be accommodated through Barr-Zee two-loop corrections [16] if the extended Higgs sector allows a relatively light pseudoscalar with large Yukawa couplings to fermions.…”

Section: Introductionmentioning

confidence: 99%

Leptonic precision test of leptophilic two-Higgs-doublet model

Chun

Kim

2016

J. High Energ. Phys.

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Abstract:The type X (lepton-specific) two-Higgs-doublet model at large tan β becomes leptophilic and thus allows a light pseudoscalar A accommodating the observed muon g − 2 deviation without conflicting with various hadronic constraints. On the other hand, it is strongly constrained by leptonic precision observables such as lepton universality test in the neutral and charged currents. Treating all the lepton universality data in a consistent way, we show how the current data constrain the parameter space of m A and tan β for given degenerate masses of heavy Higgs bosons H and H ± . While no overlapping region is found at 1σ, a sizeable region is still viable at 2σ for H/H ± masses at around 200 ∼ 400 GeV.

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Can the Higgs sector contribute significantly to the muon anomalous magnetic moment?

Cited by 74 publications

References 37 publications

Lepton-specific two Higgs doublet model as a solution of muon g − 2 anomaly

Lepton-specific two Higgs doublet model as a solution of muon g − 2 anomaly

Minimal supersymmetric standard model Higgs bosons in the intense-coupling regime

Leptonic precision test of leptophilic two-Higgs-doublet model

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