Speaker
Sascha Pascal Liechti
(University of Zurich (CH))
Description
This analysis presents a measurement of the CP structure of the Yukawa coupling between the H and top quarks at tree level. We studied a data sample with several final state leptons, enriched in ttH and tH production, collected by the CMS experiment at the CERN LHC in proton-proton collisions at $\sqrt{s}=13TeV$, corresponding to an integrated luminosity of $137fb^{-1}$.
To separate the signature of a pure CP-even H interaction from a pure CP-odd one, we use machine learning techniques. Fractionary CP-odd contributions are not observed and hence in agreement with the SM predictions of a CP-even H. Determining $|f^{Htt}_{CP}|=0.59$ with an interval of (0.24,0.81) at 68% confidence level.
Author
Sascha Pascal Liechti
(University of Zurich (CH))
