Damped $\sin(β-α)$ of Higgs couplings and the lightest Higgs production at $γγ$ colliders in MSSM

Details Damped $\sin(β-α)$ of Higgs couplings and the lightest Higgs production at $γγ$ colliders in MSSM Damped $\sin(β-α)$ of Higgs couplings and the lightest Higgs production at $γγ$ colliders in MSSM

2001-12-29

arxiv.org/abs/hep-ph/0112356v1

Phys.Rev. D66 (2002) 075002

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 12 figures and 1 table

Scientific paper

10.1103/PhysRevD.66.075002

In the decoupling limit, $M^2_{A^0} \gg M^2_Z$, the heavy CP-even, CP-odd and charged Higgs boson masses are nearly degenerate, $\sin(\beta-\alpha)$ approaches 1, and the lightest CP-even Higgs boson almost displays the same properties as the Standard Model Higgs boson. But the stop and sbottom sector can change this pattern through radiative corrections. We find that there are parameter regions at small, moderate and large $\tan\beta$ in MSSM under experimental constraints of $(g-2)_{\mu}$ and $b\to s\gamma$, where $\sin^2(\beta-\alpha)$ is damped (say below 0.8), which has a significant effect on Higgs couplings $g_{h^0VV} (V=W^\pm,Z^0)$ and $g_{h^0\gamma\gamma}$. We discuss its impact on the lightest CP-even Higgs production at $\gamma\gamma$ colliders.

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