Inclusive search for highly boosted Higgs bosons decaying to bottom quark-antiquark pairs in proton-proton collisions at $\sqrt{s}$ = 13 TeV

A search for standard model Higgs bosons (H) produced with transverse momentum (p${}_T$) greater than 450 GeV and decaying to bottom quark-antiquark pairs (bb̅) is performed using proton-proton collision data collected by the CMS experiment at the LHC at $\sqrt{s}$= 13 TeV. The data sample corresponds to an integrated luminosity of 137 fb${}^{-1}$. The search is inclusive in the Higgs boson production mode. Highly Lorentz-boosted Higgs bosons decaying to bb̅ are reconstructed as single large-radius jets, and are identified using jet substructure and a dedicated b tagging technique based on a deep neural network. The method is validated with Z → bb̅ decays. For a Higgs boson mass of 125 GeV, an excess of events above the background assuming no Higgs boson production is observed with a local significance of 2.5 standard deviations (σ), while the expectation is 0.7. The corresponding signal strength and local significance with respect to the standard model expectation are μ${}_H$ = 3.7 ± 1.2(stat)(+0.8)¦(-0.7) (syst)(+0.8)¦(-0.5) (theo) and 1.9 σ. Additionally, an unfolded differential cross section as a function of Higgs boson p${}_T$ for the gluon fusion production mode is presented, assuming the other production modes occur at the expected rates.