momentum-dependent form factor in NLO calculation
Dear authors:
I am using the SM_NLO package from http://
Modifying the top Yukawa vertices in the vertices.py file:
V_43 = Vertex(name = 'V_43',
color = [ 'Identity(1,2)' ],
with FFF1, FFF2 defined in the lorentz.py file as:
FFF1 = Lorentz(name = 'FFF1',
FFF2 = Lorentz(name = 'FFF2',
Then I put FormFactor = 1 to generate the gg->h at NLO with MadGraph. Since FormFactor =1, I should get the cross section to match the one I got without doing the above modifications (SM value). However, I got a way larger cross section. Is this related to some tricky counter-term in the model package? How should I put in the form factor coherently for NLO simulation?
Thanks in advance,
Yingying
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