PHYS08200604017 Manimala Mitra - Homi Bhabha National Institute

Decay modes Σ ± m 1
Σ ± m 2
Σ ± m 3
ν m H ± 0.363 0.473 0.473
e ± mA 0 0.247 2.28×10 −6 0.0
µ ± m A0 2.3×10 −6 0.125 0.125
τ m ± A0 2.3×10 −6 0.125 0.125
e ± mh 0 0.389 2.5×10 −6 0.0
µ ± m h0 3.6×10 −6 0.139 0.139
τ m ± h0 3.6×10 −6 0.139 0.139
Table3.2: DecaybranchingfractionsofΣ ± m 1
, Σ ± m 2
andΣ ± m 3
forM h 0=40,M H 0=150,M H ± =
170 GeV and M A 0 = 140 GeV. We have taken model parameters M 1 = 300 GeV and
M 2 = M 3 = 600 GeV.
Decay modes Σ 0 m 1
Σ 0 m 2
Σ 0 m 3
e ∓ m H± 0.368 4.3×10 −6 0.0
µ ∓ mH ± 3.4×10 −6 0.236 0.236
τm ∓H± 3.4×10 −6 0.236 0.236
ν m A 0 0.243 0.250 0.250
ν m h 0 0.386 0.277 0.277
Table3.3: DecaybranchingfractionsofΣ 0 m 1
, Σ 0 m 2
andΣ 0 m 3
forM h 0=40,M H 0=150,M H ± =
170 GeV and M A = 140 GeV. We have taken model parameters M 1 = 300 GeV and
M 2 = M 3 = 600 GeV.
and H ± is mainly driven by the difference in the masses which we have chosen for these
Higgses. In Table. 3.2 and Table. 3.3 we have taken the light Higgs mass M h 0 = 40 GeV.
We also present the branching fractions of the heavy triplet fermions for the light Higgs
mass M h 0 = 70 GeV in Table. 3.4 and in Table. 3.5.
3.6 Higgs Decay
In the previous section we have seen that the heavy fermions Σ ± m , Σ0 m will decay predominantly
into h 0 , A 0 or H ± associated with a lepton. In this section we discuss the possible
decay modes of the Higgs h 0 , A 0 and H ± . We tabulate those few which have significant
branching ratios. The branching ratios of the different Higgs decay modes depend on the
choice for the Higgs masses as well as our choice of the mixing angles α and β, which
appear in the coupling. The part of the Lagrangian containing the interaction terms of
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