Single lepton charge asymmetries in t ¯t and t ¯tγ production at the LHC Aguilar Saavedra, Juan Antonio We discuss lepton charge asymmetries in tt¯ and tt¯γ production at the LHC, which can be measured in the semileptonic decay channel tt¯→W+bW−b¯→ℓ+νbqq¯′b¯ (or the charge conjugate). Considering several variants of a new physics scenario with a light colour octet, it is seen that for tt¯ these asymmetries may have a sensitivity competitive with the dilepton asymmetry already measured. For tt¯γ the new leptonic asymmetries, as well as the tt¯ charge asymmetry, will reach their full potential with the high luminosity LHC upgrade. These asymmetries can pinpoint deviations at the 3σ−4σ level for new physics scenarios where the charge asymmetries already measured in tt¯ production agree within 1σ. 2019-06-05T07:40:46Z 2019-06-05T07:40:46Z 2018-05-31 journal article Aguilar-Saavedra, Juan Antonio. Single lepton charge asymmetries in t ¯t and t ¯tγ production at the LHC. Eur. Phys. J. C (2018) 78:434 [https://doi.org/10.1140/epjc/s10052-018-5917-7] http://hdl.handle.net/10481/55931 10.1140/epjc/s10052-018-5917-7 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España