Performing Bias Studies with a very small signal rate using the CMS Higgs Combine Tool

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!


this is perhaps a question for CMS Hypernews I believe.


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