• Open Access

Inclusive Search for a Highly Boosted Higgs Boson Decaying to a Bottom Quark-Antiquark Pair

A. M. Sirunyan et al. (CMS Collaboration)
Phys. Rev. Lett. 120, 071802 – Published 14 February 2018
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Abstract

An inclusive search for the standard model Higgs boson (H) produced with large transverse momentum (pT) and decaying to a bottom quark-antiquark pair (bb¯) is performed using a data set of pp collisions at s=13TeV collected with the CMS experiment at the LHC. The data sample corresponds to an integrated luminosity of 35.9fb1. A highly Lorentz-boosted Higgs boson decaying to bb¯ 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 Zbb¯ decays. The Zbb¯ 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 Hbb¯ with reconstructed pT>450GeV and in the pseudorapidity range 2.5<η<2.5 is 74±48(stat)10+17(syst)fb, which is consistent within uncertainties with the standard model prediction.

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  • Received 16 September 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.071802

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

© 2018 CERN, for the CMS Collaboration

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Vol. 120, Iss. 7 — 16 February 2018

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