%0 Journal Article
%T The electro-weak couplings of the top and bottom quarks – Global fit and future prospects
%A Durieux, G.
%A Irles, A.
%A Miralles, V.
%A Peñuelas, A.
%A Perello, M.
%A Poschl, R.
%A Vos, M.
%J Journal of High Energy Physics
%D 2019
%V 12
%N 12
%I Springer
%@ 1029-8479
%G English
%F Durieux_etal2019
%O WOS:000513489700002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4280), last updated on Fri, 28 Feb 2020 16:07:08 +0000
%X We evaluate the implications of LHC and LEP/SLC measurements for the electro-weak couplings of the top and bottom quarks. We derive global bounds on the Wilson coefficients of ten two-fermion operators in an effective field theory description. The combination of hadron collider data with Z -pole measurements is found to yield tight limits on the operator coefficients that modify the left-handed couplings of the bottom and top quark to the Z boson. We also present projections for the high-luminosity phase of the LHC and for future electron-positron colliders. The bounds on the operator coefficients are expected to improve substantially during the remaining LHC programme, by factors of 1 to 5 if systematic uncertainties are scaled as statistical ones. The operation of an e(+)e(-) collider at a center-of-mass energy above the top-quark pair production threshold is expected to further improve the bounds by one to two orders of magnitude. The combination of measurements in pp and e(+)e(-) collisions allows for a percent-level determination of the top-quark Yukawa coupling, that is robust in a global fit.
%K Phenomenology of Field Theories in Higher Dimensions
%R 10.1007/JHEP12(2019)098
%U https://arxiv.org/abs/1907.10619
%U https://doi.org/10.1007/JHEP12(2019)098
%P 098-44pp