Search for Higgs boson decay to a charm quark-antiquark pair via ttH production

In these proceedings, a search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H cc, produced in association with a top quark-antiquark pair (ttH) is presented. The search is performed using proton-proton collision data collected by the CMS experiment at s=13 TeV, corresponding to an integrated luminosity of 138 fb^-1. The Higgs boson decay to a bottom quark-antiquark pair is measured simultaneously and the observed ttH (H bb) event rate relative to the standard model expectation is found to be 0. 91^+0. 26-₀. ₂₂. The observed (expected) upper limit at 95\% confidence level (CL) for ttH (H cc) production is 7. 8 (8. 7) times the standard model prediction. Combined with a previous search for H cc via associated production with a W or Z boson, the observed (expected) 95\% CL interval on the Higgs-charm Yukawa coupling modifier, ₂, is ₂ < 3. 5 (₂ < 2. 7).