Speaker
Congqiao Li
(Peking University)
Description
The Higgs boson couplings to fermions and vector bosons have been well established since its discovery. Measuring the Higgs interaction with the charm quark is one of the next milestones on LHC, yet it is a challenging task due to the small branching ratio of H→cc̅ and the difficulty in charm tagging. This talk presents the latest search for a Higgs boson decaying to a cc̅ pair using the VH modes with the full Run 2 CMS dataset. Novel deep learning methods are applied to the analysis, including identification of the charm or double-charm jet and reconstruction of the jet mass. These novel techniques substantially improve the sensitivity of the search for H→cc̅ signal, leading to the most strength limit on Higgs-charm Yukawa coupling to date. It also marks the first observation of Z→cc̅ process at a hadron collider. Besides, the talk sheds light on future perspectives of Higgs-charm coupling measurements in the era of HL-LHC.
Primary author
Congqiao Li
(Peking University)
