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It is widely known that the $ZH$ production channel provides a promisingprobe to the $H \rightarrow b\bar{b}$ decay at the LHC, when the Higgs and the$Z$ bosons are highly boosted along the transverse direction. We show howinformation on the $Z$ boson polarization -- that is disregarded in the currentLHC analyses -- can relevantly improve the signal from backgrounddiscrimination, helping us to observe and achieve a larger precision for the $H\rightarrow b\bar{b}$ measurement in the $Z(\ell\ell)H$ channel.

Role of the $Z$ polarization in the $H \rightarrow b\bar{b}$ measurement