Measurements of the top-quark mass in fixed schemes and with alternative methods using the ATLAS and CMS detectors at the LHC

Selected topics of the top-quark mass measurements in well-defined schemes are presented. The measurements have been performed using data recorded with the the ATLAS and CMS detectors at the LHC at proton-proton centre-of-mass energies of 7 and 8 TeV. Precision theoretical QCD calculations for both inclusive top-antitop quark pair production and top-antitop quark pair production with an additional jet to extract the top quark mass in the pole-mass scheme have been used.