Top panel:
Ratio of background estimation variations to the default value.
Middle panel:
Ratio of signal extraction variations (bin counting range, …) to default value
Bottom panel:
Ratio of systematic variations of track and electron selection criteria to default value.
Top panel:
Ratio of background estimation variations to the default value.
Middle panel:
Ratio of signal extraction variations (bin counting range, …) to default value
Bottom panel:
Ratio of systematic variations of track and electron selection criteria to default value.
Systematic uncertainties are calculated as a function of $p_{\rm T}$. The variations are only selected if statistically significant. To check significance a Barlow test is performed.
Final systematic uncertainty is given by $max-min/\sqrt{12}$.