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Probing Top-Quark-Electron Interactions at Future Colliders.

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New physics may alter top quark interactions, deviating from the Standard Model. This study analyzes experimental limits on anomalous top quark interactions at next-to-leading order, enhancing our understanding of high-scale physics.

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Area of Science:

  • High Energy Physics
  • Particle Physics
  • Quantum Field Theory

Background:

  • Top quark interactions are sensitive probes of new physics beyond the Standard Model.
  • Deviations from Standard Model predictions in top quark interactions could indicate new high-scale physics.

Purpose of the Study:

  • To analyze experimental constraints on anomalous four-fermion e^{+}e^{-}tt[over ¯] operators.
  • To provide next-to-leading order (NLO) accuracy for electroweak and quantum chromodynamics (QCD) interactions within the Standard Model effective field theory (SMEFT) framework.

Main Methods:

  • Analysis of experimental restrictions on anomalous 4-fermion operators.
  • Inclusion of NLO corrections in electroweak and QCD interactions.
  • Utilizing the SMEFT framework to describe potential deviations.

Main Results:

  • NLO analysis reveals sensitivity to an extended set of anomalous interactions beyond leading-order probes.
  • Current limits from electroweak precision observables are compared with future projections.
  • Each analyzed experimental program enhances the precision understanding of top quark interactions.

Conclusions:

  • Experimental programs like the High Luminosity LHC, EIC, FCC-ee, and CEPC will significantly improve constraints on anomalous top quark interactions.
  • These studies are crucial for probing new physics at high scales.
  • The NLO analysis provides a more comprehensive picture of top quark interaction deviations.