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We study momentum distributions of the final-state charged lepton in ppbar/pp--> ttbar --> l^+ X (l=e or mu) at hadron colliders, i.e., Tevatron and LargeHadron Collider (LHC) in order to explore possible new-physics effects in thetop-quark sector. Assuming general model-independent ttbar g + ttbar gg and tbWinteractions beyond the standard model, we first derive analytical formulas forthe corresponding parton-parton processes. We then compute the lepton angular,energy and transverse-momentum distributions in ppbar/pp collisions to clarifyhow they are affected by those anomalous couplings.

Exploring anomalous top interactions via the final lepton in ttbar productions/decays at hadron colliders