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

G. Aad, T.P.A. Åkesson, E.E. Corrigan, C. Doglioni, J. Geisen, E. Hansen, V. Hedberg, G. Jarlskog, B. Konya, E. Lytken, K.H. Mankinen, C. Marcon, J.U. Mjörnmark, G.A. Mullier, R. Poettgen, E. Skorda, O. Smirnova, L. Zwalinski, ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

A search optimized for new heavy particles decaying to two b-quarks and produced in association with additional b-quarks is reported. The sensitivity is improved by b-tagging at least one lower-pT jet in addition to the two highest-pT jets. The data used in this search correspond to an integrated luminosity of 103 fb-1 collected with a dedicated trijet trigger during the 2017 and 2018 s=13 TeV proton-proton collision runs with the ATLAS detector at the LHC. The search looks for resonant peaks in the b-tagged dijet invariant mass spectrum over a smoothly falling background. The background is estimated with an innovative data-driven method based on orthonormal functions. The observed b-tagged dijet invariant mass spectrum is compatible with the background-only hypothesis. Upper limits at 95% confidence level on a heavy vector-boson production cross section times branching ratio to a pair of b-quarks are derived. © 2022 CERN.
Original languageEnglish
Article number012001
JournalPhysical Review D
Volume105
Issue number1
DOIs
Publication statusPublished - 2022

Subject classification (UKÄ)

  • Subatomic Physics

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