A search is presented for a heavy pseudoscalar boson A decaying to a Z boson and a Higgs boson with mass of 125GeV. In the final state considered, the Higgs boson decays to a bottom quark and antiquark, and the Z boson decays either into a pair of electrons, muons, or neutrinos. The analysis is performed using a data sample corresponding to an integrated luminosity of 35.9fb−1 collected in 2016 by the CMS experiment at the LHC from proton–proton collisions at a center-of-mass energy of 13TeV. The data are found to be consistent with the background expectations. Exclusion limits are set in the context of two-Higgs-doublet models in the A boson mass range between 225 and 1000GeV.
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Sirunyan, A.M., Tumasyan, A., Adam, W. et al. Search for a heavy pseudoscalar boson decaying to a Z and a Higgs boson at 𝑠√=13TeV. Eur. Phys. J. C 79, 564 (2019). https://doi.org/10.1140/epjc/s10052-019-7058-z