3 research outputs found
CP-odd Higgs boson production in association with Neutral gauge boson in High-Energy Collisions
We study the associated production of a CP-odd Higgs boson with a
neutral gauge boson ( or photon) in high-energy collisions at the
one-loop level in the framework of Two Higgs Doublet Models (THDM). We find
that in the small regime the top quark loop contribution is
enhanced leading to significant cross-sections (about a few fb), while in the
large regime the cross-section does not attain observable rates.Comment: 16 pages Latex, 4 figures, figures in agreement with erratu
Enhancement of Loop Induced Vertex in Two Higgs-doublet Model
The non-decoupling effects of heavy Higgs bosons as well as fermions on the
loop-induced vertex are discussed in the general two Higgs
doublet model. The decay width of the process is calculated
at one-loop level and the possibility of its enhancement is explored both
analytically and numerically. We find that the novel enhancement of the decay
width can be realized by the Higgs non-decoupling effects with large
mass-splitting between the charged Higgs boson and the CP-odd one. This is due
to the large breakdown of the custodial invariance in the Higgs
sector. The branching ratio can amount to for GeV within the constraint from the present experimental data. Hence this
mode may be detectable at LHC or future linear colliders.Comment: 31+1 pages, Latex with 8 eps-file