Update on very light CP-odd scalar in the Two-Higgs-Doublet Model

Abstract

In a previous work we have shown that a general two-Higgs-doublet model (THDM) with a very light CP-odd scalar can be compatible with electroweak precision data, such as the rho parameter, BR(b --> s gamma), R_b, A_b, BR(Upsilon --> A gamma), BR(eta --> A gamma), and (g-2) of muon. Prompted by the recent significant change in the theoretical status of the latter observable, we comment on the consequences for this model and update the allowed parameter region. It is found that the presence of a very light scalar with a mass of 0.2 GeV is still compatible with the new theoretical prediction of the muon anomalous magnetic moment.

10 pages, 11 figures, uses REVTEX 4, including updated figures and discussion considering the latest muon (g-2) data

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• Search for new phenomena in events with at least three photons collected in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Scalar sector properties of two-Higgs-doublet models with a global U(1) symmetry
• The NMSSM lives: with the 750 GeV diphoton excess
• Searching for a light Fermiophobic Higgs Boson at the Tevatron
• Search for the Decay J/psi -> gamma + invisible
• Rare Z-decay into light CP-odd Higgs bosons: a comparative study in different new physics models
• Decay H^+ -> W^+ gamma in a nonlinear R_xi-gauge
• Texture of Yukawa coupling matrices in general two-Higgs-doublet model
• Faking SM Photons by Displaced Dark Photon Decays
• Search for the exotic decay of the Higgs boson into two light pseudoscalars with four photons in the final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Implications of a very light pseudoscalar boson on lepton flavor violation
• Probing the Light Pseudoscalar Window
• Rare Z-decay into light pseudoscalar bosons in the simplest little Higgs model
• Supersymmetric One-family Model without Higgsinos