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\item {\bf MVA Electron Identification :} Electrons are identified using a Boosted Decision Tree discriminant trained on data. Identification requirements are looser for electron canidates used in the reconstruction of the on-shell $Z$. |
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\item {\bf 2D Signal Extraction :} We include angular information and the mass of the second, potentially off-shell $Z$ in the signal extraction fit via an MVA discriminant. |
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\item {\bf 2D Signal Extraction :} We include angular information and the mass of the second (potentially off-shell) $Z$ in the signal extraction fit via an MVA discriminant. |
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\item {\bf Isolation :} We apply PF isolation criteria on individual leptons. |
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