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Inclusive search for highly boosted Higgs bosons decaying to bottom quark-antiquark pairs in proton-proton collisions at ?s = 13 TeV

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 (bb¯) is performed using proton-proton collision data collected by the CMS experiment at the LHC at ?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 bb¯ 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 ? bb¯ 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 (?), while the expectation is 0.7. The corresponding signal strength and local significance with respect to the standard model expectation are ?H = 3.7 ± 1.2(stat)+0.8?0.7?0.7+0.8(syst)+0.8?0.5?0.5+0.8(theo) and 1.9 ?. 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.

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 Fuente: Journal of High Energy Physics, Vol. 2020, Num. 12, Art. Num. 085

Editorial: Springer Verlag

 Fecha de publicación: 01/12/2020

Nº de páginas: 49

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP12(2020)085

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP12(2020)085