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

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.