Baryogenesis in GUTs
107
(0)
(b)
(c)
(d)
- -...-- - ....... -
- ....... -(e)
(J)
- - ...... -
- .... -(g)
Figure 4.6. Two-loop diagrams giving one-loop radiative corrections to gauge boson and
Higgs boson decays.
The first non-zero contributions arise only from the three-loop radiative
corrections to H3 decays, and the four-loop corrections to X,Y decays.
For example. there are three-loop radiative corrections to H3 decay w_hose
contributions to the difference between the decay widths of H3 and H3 is
proportional to ImT. where
-
t
t
t h ht h
T = tr(hDhuhuhuhD DUO)
(4.81 )