Speaker
Description
In the case of the pile-up background (background from the neighboring interactions inside the bunch crossing) for Z(νν)γ process, its accurate calculation is very challenging.
If the impact of the pile-up background is negligible, as it is expected in the case of Z(νν)γ process selection, some global uncertainty from this source can be used.
This report studies the pile-up background and shows that it is expected to have totally different shape for ∆φ distributions between final state particles in comparison to the signal and other background processes.
Thus, the absence of ∆φ-mismodeling in the analysis proves that the pile-up background is indeed negligible.