implementing the fit of jet HLT response

Fitting the HLT jet response, which is not exactly Gaussian.

See #129 for more information

Looks very good, thanks!

One general question: why don't you work from the migration branch? (One can always rebase later, but the code was improved in the migration branch.)

assigned to @aziaka

requested review from @paconnor

added Ongoing label

added 1 commit

• 8f1e62eb - Incorporating comments. Creating header for TH3 Jet and HLT response histograms

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For the pt binning, I think that we can just use the edges of the single jet triggers, at least for now, i.e. the first column in the corresponding tables. For the time being, you may just hardcoce this binning, but on the long run, since the list of trigger threshold may slightly vary depending on the data set (Run 2 vs Run 3, high PU vs low PU), we should provide this file as input.

For the (pseudo)rapidity binning, although it would make sense, in principle, to use the JERC eta binning (which correspond to the calo towers), I think that it is sufficient for now to use the rapidity binning of inclusive jet and dijet.