PT Journal
AU Bernreuther, W
   Chen, L
   Garcia, I
   Perello, M
   Poeschl, R
   Richard, F
   Ros, E
   Vos, M
TI CP-violating top quark couplings at future linear e+e- colliders
SO European Physical Journal C
JI Eur. Phys. J. C
PY 2018
BP 155
EP 21pp
VL 78
IS 2
DI 10.1140/epjc/s10052-018-5625-3
LA English
AB We study the potential of future lepton colliders to probe violation of the CP symmetry in the top quark sector. In certain extensions of the Standard Model, such as the two-Higgs-doublet model (2HDM), sizeable anomalous top quark dipole moments can arise, which may be revealed by a precise measurement of top quark pair production. We present results from detailed Monte Carlo studies for the ILC at 500 GeV and CLIC at 380 GeV and use parton-level simulations to explore the potential of high-energy operation. We find that precise measurements in e(+)e(-) -> t (t) over bar production with subsequent decay to lepton plus jets final states can provide sufficient sensitivity to detect Higgs-boson-induced CP violation in a viable two-Higgs-doublet model. The potential of a linear e(+)e(-) collider to detect CP-violating electric and weak dipole form factors of the top quark exceeds the prospects of the HL-LHC by over an order of magnitude.
ER