scikit-hep / cabinetry

design and steer profile likelihood fits
https://cabinetry.readthedocs.io/
BSD 3-Clause "New" or "Revised" License
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Implement shapesys modifiers in config #454

Open alexander-held opened 8 months ago

alexander-held commented 8 months ago

Add support for shapesys modifiers via a new type of systematic for cabinetry. They would behave somewhat similarly to NormPlusShape, but are independent per bin, would not have a norm/shape split, and would come with Poisson constraint instead of Gaussian constraint. The implementation could probably closely follow NormPlusShape.

Discussed in https://github.com/scikit-hep/cabinetry/discussions/453

Originally posted by **Tomoya-Iizawa** January 18, 2024 Hello, I would like to ask if there is any way to implement systematics with decorrelated among bins? For example, if we have bins [0, 250, 500, 750, 1000] and 2-point shape systematics as ttbar-ME, is it possible to decorrelate by each bin?