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@ARTICLE{Mkaa:641723,
      author       = {Mękała, Krzysztof and Jeans, Daniel and Reuter, Jürgen
                      and Tian, Junping and Żarnecki, Aleksander Filip},
      title        = {{D}etermination of the first-generation quark couplings at
                      the {Z}-pole},
      journal      = {Journal of high energy physics},
      volume       = {11},
      number       = {11},
      issn         = {1126-6708},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {PUBDB-2025-05134, arXiv:2504.11365. DESY-25-063},
      pages        = {050},
      year         = {2025},
      note         = {cc-by, JHEP11(2025)050. 22 pages, 8 figures},
      abstract     = {Electroweak Precision Measurements are stringent tests of
                      the Standard Model and sensitive probes to New Physics.
                      Accurate studies of the Z-boson couplings to the
                      first-generation quarks, which are currently constrained
                      from LEP data to a few percent, could reveal potential
                      discrepancies from theoretical predictions. Future
                      e$^{+}$e$^{−}$ colliders running at the Z-pole would be an
                      excellent tool to improve these constraints. In this paper,
                      we present a method to extract the values of the Z couplings
                      to light quarks based on up- and down-quarks’ different
                      contributions to radiative and non-radiative Z boson decays.
                      We show that systematic uncertainty in the heavy-flavour
                      tagging performance is the key factor in the analysis, and
                      that reducing it to the sub-permille level is crucial to
                      fully profit from the high luminosity of future
                      e$^{+}$e$^{−}$ machines. The measurement could improve the
                      LEP results by at least an order of magnitude.},
      keywords     = {Electroweak Precision Physics (autogen) / Flavour
                      Symmetries (autogen)},
      cin          = {T},
      ddc          = {530},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / EAJADE
                      - Europe-America-Japan Accelerator Development and Exchange
                      Programme (101086276) / DFG project G:(GEPRIS)390833306 -
                      EXC 2121: Quantum Universe (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / G:(EU-Grant)101086276 /
                      G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2504.11365},
      howpublished = {arXiv:2504.11365},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2504.11365;\%\%$},
      doi          = {10.1007/JHEP11(2025)050},
      url          = {https://bib-pubdb1.desy.de/record/641723},
}