An inclusive search for the standard model Higgs boson ($\mathrm{H}$) produced with large transverse momentum ($p_\mathrm{T}$) and decaying to a bottom quark-antiquark pair ($\mathrm{b}\overline{\mathrm{b}}$) is performed using a data set of pp collisions at $\sqrt{s}=$ 13 TeV collected with the CMS experiment at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb$^{-1}$. A highly Lorentz-boosted Higgs boson decaying to $\mathrm{b}\overline{\mathrm{b}}$ is reconstructed as a single, large radius jet and is identified using jet substructure and dedicated $\mathrm{b}$ tagging techniques. The method is validated with $\mathrm{Z}\to\mathrm{b}\overline{\mathrm{b}}$ decays. The $\mathrm{Z}\to\mathrm{b}\overline{\mathrm{b}}$ process is observed for the first time in the single-jet topology with a local significance of 5.1 standard deviations (5.8 expected). For a Higgs boson mass of 125 GeV, an excess of events above the expected background is observed (expected) with a local significance of 1.5 (0.7) standard deviations. The measured cross section times branching fraction for production via gluon fusion of $\mathrm{H} \rightarrow \mathrm{b}\overline{\mathrm{b}}$ with $p_\mathrm{T} > $450 GeV and in the pseudorapidity range $-$2.5 $< \eta <$ 2.5 is 74 $\pm$ 48 (stat) $_{-10}^{+17}$ (syst) fb, which is consistent within uncertainties with the standard model prediction.
Fitted signal strength, expected and observed significance of the Higgs and Z boson signal. The 95% confidence level upper limit (UL) on the Higgs boson signal strength is also listed.
The $m_{SD}$ distributions in data for the failing (left) and passing (right) regions and combined $p_{T}$ categories. The QCD multijet background in the passing region is predicted using the failing region and the pass-fail ratio $R_{p/f}$. The features at 166 and 180 GeV in the $m_{SD}$ distribution are due to the kinematic selection on $\rho$, which affects each $p_{T}$ category differently. In the bottom panel, the ratio of the data to its statistical uncertainty, after subtracting the nonresonant backgrounds, is shown.
The $m_{SD}$ distributions in data for the failing (left) and passing (right) regions and combined $p_{T}$ categories. The QCD multijet background in the passing region is predicted using the failing region and the pass-fail ratio $R_{p/f}$. The features at 166 and 180 GeV in the $m_{SD}$ distribution are due to the kinematic selection on $\rho$, which affects each $p_{T}$ category differently. In the bottom panel, the ratio of the data to its statistical uncertainty, after subtracting the nonresonant backgrounds, is shown.
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