Top decay and 4 Fermion operators
Asked by
Kuntal Pal
Hello Everyone!!
So I have been trying to study the effect of Dimension 6 4 fermion operators in top quark decay. Everything runs fine but there is no interference term between the SM diagrams and 4 fermion operators. The decay width has the SM part and contribution from 4 fermion operators which go as 1/Lambda^4. The 1/Lambda^2 term is missing.
Any reason why this is happening?
Thanks
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