Top pair production at a future $e^{+}{e}^{-}$ machine in a composite Higgs scenario

Abstract

The top quark plays a central role in many New Physics scenarios and in understanding the details of Electro-Weak Symmetry Breaking. In the short- and mid-term future, top-quark studies will mainly be driven by the experiments at the Large Hadron Collider. Exploration of top quarks will, however, be an integral part of particle physics studies at any future facility and an $e^{+}{e}^{-}$ collider will have a very comprehensive top-quark physics program. We discuss the possibilities of testing NP in the top-quark sector within a composite Higgs scenario through deviations from the Standard Model in top pair production for different Centre-of-Mass energy options of a future $e^{+}{e}^{-}$ machine. In particular, we focus on precision studies of the top-quark sector at a CM energy ranging from 370 GeV up to 3 TeV.

23 pages, 10 figures; v2: minor corrections, published on JHEP

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• The top-quark window on compositeness at future lepton colliders
• Top physics at high-energy lepton colliders
• Limits on the anomalous $Wtq$ couplings
• A precise characterisation of the top quark electro-weak vertices at the ILC
• Circular and Linear ${\mathrm{e}}^{+}{\mathrm{e}}^{-}$ Colliders: Another Story of Complementarity
• Precision measurements of the top quark couplings at the FCC