Change Higgs couplings for loop_sm
Dear Experts,
I need to to change Higgs couplings universally in a way to mimic Higgs 'signal strength' changes for a kappa framework measurement. It is for the off-shell Higgs to 4 leptons analysis so the loops are important.
For the sm model I added a new internal parameter "rssH" to the FeynRules model that multiplies to each term where yu, yd, and yl show up and generated a UFO. Then multiplied the same parameter to the Higgs to VV couplings in the couplings.py file like:
GC_50 = Coupling(name = 'GC_50',
GC_59 = Coupling(name = 'GC_59',
However to simulate offshell gg(H)zz to 4 leptons I think I need loop_sm. How can I make the equivalent changes for loop_sm ?
I would like to be able to produce samples where the the "signal strength" is for example 5x the standard model (even though the concept of signal strength is a bit unclear now with interference effects).
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