Inclusive search for a highly boosted higgs boson decaying to a bottom quark-antiquark pair

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Inclusive search for a highly boosted higgs boson decaying to a bottom quark-antiquark pair. Physical Review Letters, 120 (7). 071802-1. ISSN 0031-9007 E-ISSN 1079-7114

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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=13 TeV collected with the CMS experiment at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb-1. 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 Z→bb decays. The Z→bb 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→bb with reconstructed pT>450 GeV 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.

Item Type:	Article (Journal)
Additional Information:	7861/64700
Uncontrolled Keywords:	Elementary particles; Germanium compounds; High energy physics; Statistics; Tellurium compounds
Subjects:	Q Science > Q Science (General) Q Science > QC Physics Q Science > QK Botany
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Engku Norulizati Engku Aziz
Date Deposited:	09 Jul 2018 10:15
Last Modified:	19 Oct 2018 09:34
URI:	http://irep.iium.edu.my/id/eprint/64700

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