  Several recent new measurements of the top-quark mass that use alternative
observables and reconstruction techniques are presented, performed by the ATLAS
and CMS collaborations at the CERN LHC. Alternative observables can help
provide insight by presenting different systematic sensitivities and by
constraining prevailing systematic uncertainties of standard measurements, such
as jet energy calibrations. Furthermore, the top-quark mass is extracted from
theoretically well-defined observables, such as the inclusive production cross
section for top quark pairs. Finally, the mass is measured in event topologies
dominated by electroweak-mediated single top production by both experiments.
The results of different techniques and production modes are found to be
consistent with what is obtained in standard measurements.
