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

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

2002-05-18

arxiv.org/abs/hep-ph/0205204v2

Phys.Rev. D66 (2002) 075006

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevD.66.075006

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.

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