Virtual HEP Seminar: Monday, June 22, 2020 - Measurements of ttH production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel

Event Date: 

Monday, June 22, 2020 - 12:00pm

Event Date Details: 

Event Location: 

  • Zoom
  • HEP Seminar
Measurements of ttH production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel
 
Hualin Mei, UCSB/CERN
 
This seminar discusses a recent CMS result based on the full dataset of LHC Run 2. Decays of the Higgs boson to photons have been used to investigate the ttH process. A significance of 6.6 s.d. is achieved in this single channel. The product of cross section and branching fraction is measured to be 1.56+0.34−0.32 fb. The sample is also used to investigate the CP structure of the top Yukawa coupling, and a pure CP-odd structure is excluded at 3.2. s.d.