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Search for bottom-squark pair production in pp collision events at √s = 13 TeV with hadronically decaying τ-leptons, b-jets, and missing transverse momentum using the ATLAS detector

Aad, G

Physical review. D, 2021-08, Vol.104 (3), p.1 [Periódico revisado por pares]

College Park: American Physical Society

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  • Título:
    Search for bottom-squark pair production in pp collision events at √s = 13 TeV with hadronically decaying τ-leptons, b-jets, and missing transverse momentum using the ATLAS detector
  • Autor: Aad, G
  • Assuntos: Confidence intervals ; Fysik ; Higgs bosons ; Large Hadron Collider ; Leptons ; Luminosity ; Natural Sciences ; Naturvetenskap ; Pair production ; Particle collisions ; Particle decay ; Physical Sciences ; Protons ; Quarks ; Searching ; Subatomic Physics ; Subatomär fysik ; Transverse momentum
  • É parte de: Physical review. D, 2021-08, Vol.104 (3), p.1
  • Notas: NFR/310713
  • Descrição: A search for pair production of bottom squarks in events with hadronically decaying τ-leptons, b-tagged jets, and large missing transverse momentum is presented. The analyzed dataset is based on proton-proton collisions at √s = 13 TeV delivered by the Large Hadron Collider and recorded by the ATLAS detector from 2015 to 2018, and corresponds to an integrated luminosity of 139 fb−1. The observed data are compatible with the expected Standard Model background. Results are interpreted in a simplified model where each bottom squark is assumed to decay into the second-lightest neutralino χ02 and a bottom quark, with χ02 decaying into a Higgs boson and the lightest neutralino χ01. The search focuses on final states where at least one Higgs boson decays into a pair of hadronically decaying τ-leptons. This allows the acceptance and thus the sensitivity to be significantly improved relative to the previous results at low masses of the χ02, where bottom-squark masses up to 850 GeV are excluded at the 95% confidence level, assuming a mass difference of 130 GeV between χ02 and χ01. Model-independent upper limits are also set on the cross section of processes beyond the Standard Model.
  • Editor: College Park: American Physical Society
  • Idioma: Inglês;Norueguês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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