Top-quark electroweak couplings at the FCC-ee

  • Patrick Janot
Open Access
Regular Article - Experimental Physics


An optimal-observable analysis of the lepton angular and energy distributions from top-quark pair production with semi-leptonic decays in e+e collisions is used to predict the potential sensitivity of the FCC-ee to the couplings of the top quark to the photon and the Z.


e+-e- Experiments 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.


  1. [1]
  2. [2]
    TLEP Design Study Working Group collaboration, M. Bicer et al., First Look at the Physics Case of TLEP, JHEP 01 (2014) 164 [arXiv:1308.6176] [INSPIRE].Google Scholar
  3. [3]
    H. Baer et al., The International Linear Collider Technical Design Report - Volume 2: Physics, Tech. Rep. (2013) [arXiv:1306.6352] [INSPIRE].
  4. [4]
    S. Jadach and Z. Was, Z Physics at LEP1, Vol. 1: Standard Physics, Tech. Rep. CERN-89-08 (1989) CERN-89-08-V-1 (1989).
  5. [5]
    ALEPH, DELPHI, L3, OPAL, SLD, LEP Electroweak Working Group, SLD Electroweak Group, SLD Heavy Flavour Group collaboration, S. Schael et al., Precision electroweak measurements on the Z resonance, Phys. Rept. 427 (2006) 257 [hep-ex/0509008] [INSPIRE].ADSGoogle Scholar
  6. [6]
    B. Grzadkowski and Z. Hioki, Optimal observable analysis of the angular and energy distributions for top quark decay products at polarized linear colliders, Nucl. Phys. B 585 (2000) 3 [hep-ph/0004223] [INSPIRE].ADSCrossRefGoogle Scholar
  7. [7]
    M. Davier, L. Duflot, F. Le Diberder and A. Rouge, The optimal method for the measurement of tau polarization, Phys. Lett. B 306 (1993) 411 [INSPIRE].ADSCrossRefGoogle Scholar
  8. [8]
    M. Diehl and O. Nachtmann, Optimal observables for the measurement of three gauge boson couplings in e + e W + W , Z. Phys. C 62 (1994) 397 [INSPIRE].ADSGoogle Scholar
  9. [9]
    M.S. Amjad et al., A precise determination of top quark electro-weak couplings at the ILC operating at \( \sqrt{s}=500 \) GeV, arXiv:1307.8102 [INSPIRE].
  10. [10]
    E. Boos, M. Dubinin, A. Pukhov, M. Sachwitz and H.J. Schreiber, Single top production in e + e , e e , γe and γγ collisions, Eur. Phys. J. C 21 (2001) 81 [hep-ph/0104279] [INSPIRE].ADSCrossRefGoogle Scholar
  11. [11]
    FCC-ee, Official web site, (2014).
  12. [12]
    M. Vos, Precision top quark physics at a future linear e+e collider, 9th FCC-ee physics workshop, Pisa Italy 2015,
  13. [13]
    P.H. Khiem, E. Kou, Y. Kurihara and F.L. Diberder, Probing New Physics using top quark polarization in the \( {e}^{+}{e}^{-}\to t\overline{t} \) process at future Linear Colliders, arXiv:1503.04247 [INSPIRE].

Copyright information

© The Author(s) 2015

Authors and Affiliations

  1. 1.CERN, PH DepartmentGenevaSwitzerland

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