“…Electron candidates are identified in the central electromagnetic calorimeter (CEM) or in the forward, known as the plug, electromagnetic calorimeter (PEM) as isolated, mostly electromagnetic, clusters that match a reconstructed silicon track in the pseudorapidity range |η| < 1.1 and 1.1 < |η| < 2.0, respectively. The electron transverse energy is reconstructed from the electromagnetic cluster with a precision σ(E T )/E T ≈ 13.5%/ E T (GeV) ⊕ 2% for central electrons [21] and σ(E T )/E T = 16.0%/ E T (GeV) ⊕ 2% for plug electrons [24]. Jets are identified as a group of electromagnetic calorimeter energy (E EM ) and hadronic calorimeter energy (E HAD ) clusters populating a cone of radius ∆R ≈ (∆φ) 2 + (∆η) 2 ≤ 0.4 units around a high-E T seed cluster [25].…”