Hi all,
This question might be specific for CMS members as I’m currently using CMS Higgs Combine Tool to perform bias studies.
I have a very small signal rate for my process ~1e-11 resulting to my toys fits don’t converge at all. I tried to scale my signal rate to a factor of ~1e10 and the fits turn fine, suggesting that having a small signal rate is the culprit. Is there any way to solve this problem? Thanks a lot!