Measurement of differential t-channel production cross-sections of single top quarks and top antiquarks at √(s)=13 TeV with the ATLAS detector

2025/12/10 by Kretschmann, Lukas
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.2512.09379

Abstract

The differential production cross-sections of single top quarks and top antiquarks produced via the t-channel process are measured in proton-proton collisions at √(s)=13 TeV at the LHC with the full Run 2 ATLAS dataset corresponding to an integrated luminosity of 140 fb^-1. The cross-sections are measured as a function of the transverse momentum and absolute rapidity of the top quark (tq) and top antiquark (tq) at parton level. In addition, for the first time, the differential ratio of the tq to tq cross-sections is presented. The results are compared to theoretical predictions from fixed-order calculations, various event generators, and different PDF sets. An interpretation in the framework of an effective field theory (EFT) is performed to constrain the Wilson coefficient C^3,1_Qq of the four-fermion operator.

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