# How to get the total cross section (i.e. xsec_SM+xsec_BSM)

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S

Dear,

I'm trying to calculate the cross section of a certain process, including an EFT (BSM) model. Before loading the model, I calculate the SM cross section,

generate [process]

then I calculate the BSM contributions (linear and quadratic) after loading the model,

generate [process] [operator]^2==1

generate [process] [operator]==1

But when I try to calculate the total cross section after loading the model,

generate [process]

(tried generate [process] [operator]<=1)

it doesn't add up to the sum of xsec_SM and xsec_BSM

am I doing something wrong when calculating the total cross section?

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