I am reading Mukhanov's 'Physical Foundations of Cosmology'. He claims that in the minimal SU(5) model, CP violation of a heavy SU(5) gauge boson X decay arises at the tenth order of perturbation theory.(adsbygoogle = window.adsbygoogle || []).push({});

Is that correct? The tenth order perturbation theory would lead to a very complicated diagram and why one loop correction doesn't contribute?

Btw, what confuses me is on page 212.

Thanks

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# SU(5) model, gauge boson decay

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