Speaker
Description
With the highest expected branching-ratio (56\%), the Higgs boson decay into a $b$-quark pair plays a crucial role in the determination of the Higgs Yukawa couplings, as well as its general properties. On the other end, the Higgs boson is expected to decay to $c$-quarks much more rarely, with a branching-ratio of 3\%, and the search of this decay requires the state of the art of jet identification and analysis techniques. At the LHC, the best sensitivity to the $H\rightarrow b\bar{b}$\$c\bar{c}$ decay is achieved exploiting the associate production of the Higgs boson with a vector boson, requesting its leptonic decay allowing for an efficient trigger capability and an effective multi-jet background rejection. In this talk, measurements of Higgs boson decays into $b/c$-quarks produced in association with a vector boson, made by the ATLAS experiment using the full Run2 dataset at $\sqrt{s}$ 13 TeV, are shown, together with the results of the combinations of the two channels.
