Abstract
A search for standard model Higgs bosons (H) produced with transverse momentum (pT) greater than 450 GeV and decaying to bottom quark-antiquark pairs ( mathrm{b}overline{mathrm{b}} ) 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 mathrm{b}overline{mathrm{b}} 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 → mathrm{b}overline{mathrm{b}} 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 μH = 3.7 ± 1.2(stat) {}_{-0.7}^{+0.8} (syst) {}_{-0.5}^{+0.8} (theo) and 1.9 σ. Additionally, an unfolded differential cross section as a function of Higgs boson pT for the gluon fusion production mode is presented, assuming the other production modes occur at the expected rates.
Highlights
Background estimationThe dominant background in the signal region is quantum chromodynamics (QCD) multijet production
This paper reports the results of an inclusive s√earch for high-produced with transverse momentum (pT) Higgs bosons decaying to bb pairs in proton-proton collisions at s = 13 TeV
An inclusive search for the standard model (SM) Higgs boson decaying to a bottom quarkantiquark pair and reconstructed as a single large-radius jet with transverse momentum pT at
Summary
The central feature of the CMS apparatus is a superconducting solenoid of 6 m internal diameter, providing a magnetic field of 3.8 T inside its volume. Forward calorimeters extend the pseudorapidity (η) coverage provided by the barrel and endcap detectors. Events of interest are selected using a two-tiered trigger system [37]. The first level, composed of custom hardware processors, uses information from the calorimeters and muon detectors to select events at a rate of around 100 kHz within a time interval of less than 4 μs. The second level, known as the high-level trigger, consists of a farm of processors running a version of the full event reconstruction software optimized for fast processing, and reduces the event rate to around 1 kHz before data storage. A more detailed description of the CMS detector, together with a definition of the coordinate system used and the relevant kinematic variables, can be found in ref. [38]
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