Inclusive Search for a Highly Boosted Higgs Boson Decaying to a Bottom Quark-Antiquark Pair
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PhysRevLett.120.071802.pdf
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Author(s)
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Brondolin, E.
Dragicevic, M.
Erö, J.
Date Issued
February 2018
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Sirunyan, A. M., et al. “Inclusive Search for a Highly Boosted Higgs Boson Decaying to a Bottom Quark-Antiquark Pair.” Physical Review Letters, vol. 120, no. 7, Feb. 2018. © 2018 CERN, for the CMS Collaboration
Version
Final published version
Abstract
An inclusive search for the standard model Higgs boson (H) produced with large transverse momentum (p[subscript T]) and decaying to a bottom quark-antiquark pair (b[¯ over b]) is performed using a data set of pp collisions at √s =13 TeV collected with the CMS experiment at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb[superscript -1]. A highly Lorentz-boosted Higgs boson decaying to b[¯ over b] is reconstructed as a single, large radius jet, and it is identified using jet substructure and dedicated b tagging techniques. The method is validated with Z→b[¯ over b] decays. The Z→b[¯ over 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 H→b[¯ over b] with reconstructed p[subscript T]>450 GeV and in the pseudorapidity range -2.5<η<2.5 is 74±48(stat)[subscript -10][superscript +17](syst) fb, which is consistent within uncertainties with the standard model prediction.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.120.071802
