Question

Do the Cutkosky rules imply (perturbative) unitarity?

Answer 1

it seems like the Cutkosky rules are a consequence of unitarity, but the converse may fail. I think that is may be possible for the sum rule for the exact propagator for bare fields to be violated without predicting that any unphysical states are generated from cutting loop diagrams. Obviously, perturbative unitarity breaks down whenever the couplings exceed perturbative unitarity bounds. Non-perturbatively, I think there could exist a situation in which a particle's field strength renormalization is too large such that the contribution of the multiparticle spectru

Answer 2

Hello Friend..❤️❤️

The answer of u r question is..✌️✌️

DO THE CUTKOSKY RULES IMPLY UNITARITY?????

Ans:✍️✍️✍️✍️✍️✍️✍️✍️✍️✍️

It seems like that but Kasi rules are a consequence of Unity but the Converse may fail I thought it may be possible for the sum rule for the exact propagator for field field should be violated without redirecting that any and physical states are generated from cutting loop diagrams.


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