TY  - JOUR
AU  - Durieux, G.
AU  - Irles, A.
AU  - Miralles, V.
AU  - Peñuelas, A.
AU  - Perello, M.
AU  - Poschl, R.
AU  - Vos, M.
PY  - 2019
DA  - 2019//
TI  - The electro-weak couplings of the top and bottom quarks – Global fit and future prospects
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 098
EP  - 44pp
VL  - 12
IS  - 12
PB  - Springer
KW  - Phenomenology of Field Theories in Higher Dimensions
AB  - 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.
SN  - 1029-8479
UR  - https://arxiv.org/abs/1907.10619
UR  - https://doi.org/10.1007/JHEP12(2019)098
DO  - 10.1007/JHEP12(2019)098
LA  - English
N1  - WOS:000513489700002
ID  - Durieux_etal2019
ER  -