Higgs FCNC h -> t* c decay at the muon collider

Details Higgs FCNC h -> t* c decay at the muon collider Higgs FCNC h -> t* c decay at the muon collider

2009-11-23

arxiv.org/abs/0911.4472v2

Phys.Rev.D81:037303,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 3 figures. References added

Scientific paper

10.1103/PhysRevD.81.037303

We study the discovery potential of the flavor-changing neutral coupling (FCNC) htc of the Higgs boson and the top quark through the rare tree-body decay h -> Wbc at Muon colliders for a light Higgs boson with mass 114 < m_h < 145 GeV. This decay mode may compete with the SM background induced by the hWW coupling in some models with a tree-level htc coupling and with models that predict this coupling at the one-loop level in the range 10^{-2} - 10^{-1}. A future muon collider could test the scalar FCNC decay t -> hc via Higgs decay h -> t* c -> b W+ c down to values of the coupling g_{tc}=0.5 (that are equivalent to BR(t -> hc) = 5 x 10^{-3}). The LHC could probe values of g_{tc} one order of magnitude smaller, unless other processes beyond the SM appear that through intense multi jet activity may clutter the t -> hc signal.

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