Abstract
We present a procedure for the determination of the mass of the top quark at the LHC based on leptonic observables in dilepton \( t\overline{t} \) events. Our approach utilises the shapes of kinematic distributions through their few lowest Mellin moments; it is notable for its minimal sensitivity to the modelling of long-distance effects, for not requiring the reconstruction of top quarks, and for having a competitive precision, with theory errors on the extracted top mass of the order of 0.8 GeV. A novel aspect of our work is the study of theoretical biases that might influence in a dramatic way the determination of the top mass, and which are potentially relevant to all template-based methods. We propose a comprehensive strategy that helps minimise the impact of such biases, and leads to a reliable top mass extraction at hadron colliders.
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Frixione, S., Mitov, A. Determination of the top quark mass from leptonic observables. J. High Energ. Phys. 2014, 12 (2014). https://doi.org/10.1007/JHEP09(2014)012
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DOI: https://doi.org/10.1007/JHEP09(2014)012