Reshuffling of final state particle's momenta to keep intermediate particle's mass fix

Asked by Niks


I am working on Diagram Subtraction method for the interference between tW(NLO) and tt~(LO). For this I need to reshuffle the momenta's of W-b~(decay product of t~), to get delta peak in t~ mass distribution instead of smeared peak. Therefore, accordingly I have to change the corresponding t(> W+b) momenta's. And then after this reshuffling, I have to generate corresponding events. Please suggest me the possible solution for this (How to proceed?)

I'll heartily appreciate your help.


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MadGraph5_aMC@NLO Edit question
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