104
Baryogenesis
d
Hs- - -
11
u
Hs- - -
l
cl
H3 - -
u
Figure 4.3. Baryon-number non-conserving decays of SU(5) GUT colour triplet Higgs
bosons.
As before, in (4.68), the difference in the baryon number B and the lepton
number L is the same for all decays:
B-L=-'J
2
(4.72)
so B - L is conserved in all Higgs mediated processes. CP-violation arises from
complex phases which cannot be absorbed by field redefinitions but, as we shall
see, there is no contribution to t!.B at tree level. These couplings arise from the
Feynman vertices shown in figure 4.4.
Baryogenesis
d
Hs- - -
11
u
Hs- - -
l
cl
H3 - -
u
Figure 4.3. Baryon-number non-conserving decays of SU(5) GUT colour triplet Higgs
bosons.
As before, in (4.68), the difference in the baryon number B and the lepton
number L is the same for all decays:
B-L=-'J
2
(4.72)
so B - L is conserved in all Higgs mediated processes. CP-violation arises from
complex phases which cannot be absorbed by field redefinitions but, as we shall
see, there is no contribution to t!.B at tree level. These couplings arise from the
Feynman vertices shown in figure 4.4.