A search optimized for new heavy particles decaying to two b-quarks andproduced in association with additional b-quarks is reported. Thesensitivity is improved by b-tagging at least one lower-pT jet inaddition to the two highest-pT jets. The data used in this searchcorrespond to an integrated luminosity of 103 fb-1 collected with adedicated trijet trigger during the 2017 and 2018 pffisffi = 13 TeVproton-proton collision runs with the ATLAS detector at the LHC. Thesearch looks for resonant peaks in the b-tagged dijet invariant massspectrum over a smoothly falling background. The background is estimatedwith an innovative data-driven method based on orthonormal functions.The observed b-tagged dijet invariant mass spectrum is compatible withthe background-only hypothesis. Upper limits at 95\% confidence level ona heavy vector-boson production cross section times branching ratio to apair of b-quarks are derived.

Search for heavy particles in the b-tagged dijet mass distribution with additional b-tagged jets in proton-proton collisions at p root s=13 TeV with the ATLAS experiment

Capua, M.;Mastroberardino, A.;Meoni, E.;Schioppa, M.;Tassi, E.;
2022-01-01

Abstract

A search optimized for new heavy particles decaying to two b-quarks andproduced in association with additional b-quarks is reported. Thesensitivity is improved by b-tagging at least one lower-pT jet inaddition to the two highest-pT jets. The data used in this searchcorrespond to an integrated luminosity of 103 fb-1 collected with adedicated trijet trigger during the 2017 and 2018 pffisffi = 13 TeVproton-proton collision runs with the ATLAS detector at the LHC. Thesearch looks for resonant peaks in the b-tagged dijet invariant massspectrum over a smoothly falling background. The background is estimatedwith an innovative data-driven method based on orthonormal functions.The observed b-tagged dijet invariant mass spectrum is compatible withthe background-only hypothesis. Upper limits at 95\% confidence level ona heavy vector-boson production cross section times branching ratio to apair of b-quarks are derived.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/333060
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