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 in the 2HDM and slightly beyond: An updated view

Ferreira, P. M.; Gonçalves, B. L.; Joaquim, F. R.; Sher, Marc

doi:10.1103/physrevd.104.053008

Cited by 23 publications

(8 citation statements)

References 48 publications

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“…Finally, in view of recent events [110], one might wonder whether the anomalous magnetic momentum of the muon can be explained by the model discussed here. Contributions should be similar to the ones of a general THDM of type II, as, e.g., discussed in [111,112], with additional contributions of the second pseudoscalar a, including appropriate rescaling. However, from the above work, it becomes obvious that pseudoscalar masses would have to be light, 200 GeV, with additionally relatively large tan β values 15, in order to account for the observed experimental value.…”

Section: Discussionmentioning

confidence: 99%

The THDMa Revisited

Robens

2021

Symmetry

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The THDMa is a new physics model that extends the scalar sector of the Standard Model by an additional doublet as well as a pseudoscalar singlet and allows for mixing between all possible scalar states. In the gauge-eigenbasis, the additional pseudoscalar serves as a portal to the dark sector, with a priori any dark matter spins states. The option where dark matter is fermionic is currently one of the standard benchmarks for the experimental collaborations, and several searches at the LHC constrain the corresponding parameter space. However, most current studies constrain regions in parameter space by setting all but 2 of the 12 free parameters to fixed values. In this work, we performed a generic scan on this model, allowing all parameters to float. We applied all current theoretical and experimental constraints, including bounds from current searches, recent results from B-physics, in particular Bs→Xsγ, as well as bounds from astroparticle physics. We identify regions in the parameter space which are still allowed after these were applied and which might be interesting for an investigation of current and future collider machines.

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Section: Discussionmentioning

confidence: 99%

The THDMa Revisited

Robens

2021

Symmetry

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“…5 A second Higgs doublet has been examined as a way to explain the muon g − 2 anomaly. In the Type-X [18][19][20][21][22][23][24][25][26][27][28][29][30][31] and Flavour-Aligned [32][33][34][35][36][37] versions of the THDM the contributions from two-loop diagrams are dominant in most of the parameter space thanks to mechanisms also available in the GTHDM. Additionally, with LFV, the one-loop diagrams can receive a chirality flip enhancement from including the tau lepton in the diagram loop, as was investigated by [38][39][40][41][43][44][45][46], however they only examined muon g − 2 contributions at the one-loop level.…”

Section: Leptonic Observablesmentioning

confidence: 99%

Likelihood analysis of the flavour anomalies and g – 2 in the general two Higgs doublet model

Athron

Balázs

Gonzalo

et al. 2022

J. High Energ. Phys.

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We present a likelihood analysis of the general two Higgs doublet model, using the most important currently measured flavour observables, in view of the anomalies in charged current tree-level and neutral current one-loop rare decays of B mesons in b → cl$$ \overline{\nu} $$ ν ¯ and b → sμ+μ− transitions, respectively. We corroborate that the model explains the latter and it is able to simultaneously fit the experimental values of the R(D) charged current ratio at 1σ, but it can not accommodate the D* charmed meson observables R(D*) and FL(D*). We find that the fitted values for the angular observables in b → sμ+μ− transitions exhibit better agreement with the general two Higgs double model in comparison to the SM. We also make predictions for future collider observables BR(t → ch), BR(h → bs), BR(h → τμ), BR(Bs → τ+τ−), BR(B+ → K+τ+τ−) and the flavour violating decays of the τ lepton, BR(τ → 3μ) and BR(τ → μγ). The model predicts values of BR(t → ch), BR(Bs → τ+τ−) and BR(B+ → K+τ+τ−) that are out of reach of future experiments, but its predictions for BR(h → bs) and BR(h → τμ) are within the future sensitivity of the HL-LHC or the ILC. We also find that the predictions for the τ → 3μ and τ → μγ decays are well within the projected limits of the Belle II experiment. Finally, using the latest measurement of the Fermilab Muon g − 2 Collaboration, we performed a simultaneous fit to ∆aμ constrained by the charged anomalies, finding solutions at the 1σ level. Once the neutral anomalies are included, however, a simultaneous explanation is unfeasible.

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“…Since this article mainly addresses the LHC physics practitioner let us briefly explain how a light pseudoscalar a contributes to a µ in the 2HDM+a model of type-II. See also also [73][74][75][76][77][78][79][80] for related discussions. The virtual exchange of a pseudoscalar a leads to a correction to a µ at the one-loop level.…”

Section: Benchmark IImentioning

confidence: 99%

Benchmarking LHC searches for light 2HDM+$\boldsymbol{a}$ pseudoscalars

Argyropoulos¹,

Haisch²

2022

Preprint

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Using two suitable benchmark scenarios that satisfy the experimental constraints on the total decay width of the 125 GeV Higgs boson, we determine the bounds on light CP-odd spin-0 states in the 2HDM+a model that arise from existing LHC searches. Our work should prove useful for 2HDM+a interpretations of future ATLAS, CMS and LHCb searches for pseudoscalars with masses below the electroweak scale.

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(g−2)μ in the 2HDM and slightly beyond: An updated view

Cited by 23 publications

References 48 publications

The THDMa Revisited

The THDMa Revisited

Likelihood analysis of the flavour anomalies and g – 2 in the general two Higgs doublet model

Benchmarking LHC searches for light 2HDM+$\boldsymbol{a}$ pseudoscalars

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