Precise measurement of light-quark electroweak couplings at future colliders
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 could reveal potential discrepancies between the fundamental theory and experimental data. Future lepton colliders offering high statistics of Z bosons would be an excellent tool to perform such a measurement based on comparison of radiative and non-radiative hadronic decays of the Z boson. Due to the difference in quark charge, the relative contribution of the events with final-state radiation (FSR) directly reflects the ratio of up- and down-type quark decays. Such an analysis requires a proper distinction between photons coming from different sources, including initial-state radiation (ISR), FSR, parton showers and hadronisation. In our talk, we will show how to extract the values of the Z couplings to quarks and present preliminary results of the analysis for ILC.
Keywords
Cite
@article{arxiv.2406.04040,
title = {Precise measurement of light-quark electroweak couplings at future colliders},
author = {Krzysztof Mękała and Daniel Jeans and Junping Tian and Jürgen Reuter and Aleksander Filip Żarnecki},
journal= {arXiv preprint arXiv:2406.04040},
year = {2024}
}
Comments
Presented at the XXX Cracow EPIPHANY Conference on Precision Physics at High Energy Colliders