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

Author(s)
Sirunyan, A. M; Tumasyan, A.; Adam, W.; Ambrogi, F.; Bergauer, T.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Frühwirth, R.; Jeitler, M.; Krammer, N.; Lechner, L.; Liko, D.; Madlener, T.; Mikulec, I.; Pitters, F. M; Rad, N.; Schieck, J.; ... Show more Show less
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Abstract
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 ( b b ¯ $$ \mathrm{b}\overline{\mathrm{b}} $$ ) is performed using proton-proton collision data collected by the CMS experiment at the LHC at s $$ \sqrt{s} $$ = 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 b b ¯ $$ \mathrm{b}\overline{\mathrm{b}} $$ 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 → b b ¯ $$ \mathrm{b}\overline{\mathrm{b}} $$ 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 $$ {}_{-0.7}^{+0.8} $$ (syst) − 0.5 + 0.8 $$ {}_{-0.5}^{+0.8} $$ (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.
Date issued
2020-12-11
URI
https://hdl.handle.net/1721.1/132090
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2020 Dec 11;2020(12):85
Version: Final published version

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