How to adjust roofit parameters

Dear experts,
I am trying to fit a very complex distribution(PFA below). I have been adjusting the roofit parameters over and over again, but to no avail. Is there a way I have to adjust these parameters other than complete random try and error?

Like is there something in the roofit output that I can use to my advantage to ‘finetune’ these parameters?

Thank You!
Lambda_gaus.C (13.0 KB)

Hi @Vikas_Raj,

I think that @jonas could help with this!


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