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WOLFRAM|DEMONSTRATIONS PROJECT

Branching Ratios for Higgs Boson Decays

​
decay mode
b
-
b
τ
-
τ
c
-
c
gg
γγ
W
+
W
-
ZZ
t
-
t
α
α
s
5
10
50
100
500
1000
10
-5
10
-4
0.001
0.010
0.100
1
M
H
(GeV)
BR(H)
b
-
b
τ
-
τ
c
-
c
gg
γγ
W
+
W
-
ZZ
t
-
t

This Demonstration describes the variation of the Higgs boson branching ratios
BR(H)
, for eight different decay modes, as a function of the Higgs boson mass
M
H
. The results are obtained using first-order perturbation theory. Curves are shown for Higgs decay into pairs of gauge bosons (γ, g, Z, and W) and some fermion/anti-fermion pairs (τ, c, b, t), for different values of the coupling constants
α
,
e
, and
α
s
(m
z
)
. This is, in fact, a simple simulation of what the world might look like if
α≠1/137
and
α
s
(m
z
)≠0.12
. The effects of the coupling strengths on particle masses are not considered. You can display any one or combination of decay modes by marking the corresponding checkboxes.