CMS-PAS-HIG-19-003

CMS-PAS-HIG-19-003
Inclusive search for a highly boosted Higgs boson decaying to a bottom quark-antiquark pair at $\sqrt{s} =$ 13 TeV with 137 fb $^{-1}$
CMS Collaboration
April 2020

Abstract: An inclusive search for the standard model Higgs boson produced with large transverse momentum ( $p_\mathrm{T}$ ) and decaying to a bottom quark-antiquark pair is performed using pp collisions 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 $^{-1}$ . Highly Lorentz-boosted Higgs bosons decaying to $\mathrm{b}\overline{\mathrm{b}}$ are reconstructed as single, large radius jets, and are identified using jet substructure and dedicated b tagging techniques based on a deep neural network. The method is validated with $\mathrm{Z}\to\mathrm{b}\overline{\mathrm{b}}$ decays. For a Higgs boson mass of 125 GeV, an excess of events above the expected background is observed with a local significance of 2.54 standard deviations, where the expectation is 0.71. The corresponding signal strength is $\mu_\mathrm{H} =$ 3.68 $\pm$ 1.20 (stat) $_{-0.66}^{+0.63}$ (syst) $_{-0.46}^{+0.81}$ (theo) with respect to the standard model expectation. Additionally, an unfolded differential cross section as a function of Higgs boson $p_\mathrm{T}$ is presented. With respect to the previous CMS result, the relative precision of the Higgs boson signal strength measurement improves by approximately a factor of two. The improvement is due to the increased integrated luminosity, improved b tagging, and smaller theoretical uncertainties.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; These preliminary results are superseded in this paper, JHEP 12 (2020) 085. The superseded preliminary plots can be found here.

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