Linear power corrections to single top production and decay at the LHC in the narrow width approximation

Autor: Sergei Makarov, Kirill Melnikov, Paolo Nason, Melih A. Ozcelik
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Journal of High Energy Physics, Vol 2024, Iss 11, Pp 1-39 (2024)
Druh dokumentu: article
ISSN: 1029-8479
DOI: 10.1007/JHEP11(2024)112
Popis: Abstract We consider top quark production and decay in the narrow width approximation and study if the polarisation effects, that manifest themselves in correlations of angular distributions of particles from top quark decays and final state jets in the production sub-process, are affected by linear power corrections. We find that, in general, the answer to this question is affirmative. We also discuss how these non-perturbative corrections affect polarisation observables used to study single top production at the LHC. Finally, we point out that generic kinematic distributions of leptons from top quark decays are affected by linear power corrections, which may have implications for proposals to extract the top quark mass from such leptonic observables. On the other hand, we demonstrate that the distribution of the “out-of-collision-plane” component of the positron momentum is free from linear power corrections, making it an interesting candidate for the top quark mass measurement.
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