# SUSY 2016

3-8 July 2016
The University of Melbourne
Australia/Melbourne timezone

## Unraveling the CP phase of top-Higgs coupling in associated production at the LHC

7 Jul 2016, 14:20
20m
Yasuko Hiraoka Myer Room ()

### Yasuko Hiraoka Myer Room

Talk Higgs Physics

### Description

We study the sensitivity of top polarization observables to the CP phase $\zeta_t$ in the top Yukawa coupling in the process $pp\to thj$ at the 14 TeV high-luminosity run of Large Hadron Collider (HL-LHC). We calculate the top polarization in this process as well as an azimuthal asymmetry of the charged lepton arising from the decay of the top in the laboratory frame. We find that the dependence of this laboratory-frame azimuthal asymmetry on the phase $\zeta_t$ is closely similar to the dependence of the top polarization on $\zeta_t$. As compared to the cross section, which is sensitive to $\zeta_t$ for larger values, the lepton azimuthal asymmetry can provide a sensitive measurement of $\zeta_t$ for smaller values.