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Träfflista för sökning "WFRF:(Lou Xuanhong 1995 ) srt2:(2021)"

Sökning: WFRF:(Lou Xuanhong 1995 ) > (2021)

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1.
  • Andrean, Stefio Y., 1991-, et al. (författare)
  • Search for chargino–neutralino pair production in final states with three leptons and missing transverse momentum in √s=13 TeV pp collisions with the ATLAS detector
  • 2021
  • Ingår i: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 81:12
  • Tidskriftsartikel (refereegranskat)abstract
    • A search for chargino–neutralino pair productionin three-lepton final states with missing transverse momentum is presented. The study is based on a dataset of √s =13 TeV pp collisions recorded with the ATLAS detectorat the LHC, corresponding to an integrated luminosity of 139 fb−1. No significant excess relative to the Standard Model predictions is found in data. The results are interpreted in simplified models of supersymmetry, and statistically combined with results from a previous ATLAS search for compressed spectra in two-lepton final states. Various scenarios for the production and decay of charginos (χ˜ ±1 ) and neutralinos (χ˜ 02 ) are considered. For pure higgsino χ˜ ±1 χ˜ 02 pair production scenarios, exclusion limits at 95% confidence level are set on χ˜ 02 masses up to 210 GeV. Limits are also set for pure wino χ˜ ±1 χ˜ 02 pair production, on χ˜ 02 masses up to 640 GeV for decays via on-shell W and Z bosons, up to 300 GeV for decays via off-shell W and Z bosons, and up to 190 GeV for decays via W and Standard Model Higgs bosons.
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2.
  • Andrean, Stefio Y., 1991-, et al. (författare)
  • The ATLAS Fast TracKer system
  • 2021
  • Ingår i: Journal of Instrumentation. - : Institute of Physics Publishing (IOPP). - 1748-0221. ; 16:7
  • Tidskriftsartikel (refereegranskat)abstract
    • The ATLAS Fast TracKer (FTK) was designed to provide full tracking for the ATLAS high-level trigger by using pattern recognition based on Associative Memory (AM) chips and fitting in high-speed field programmable gate arrays. The tracks found by the FTK are based on inputs from all modules of the pixel and silicon microstrip trackers. The as-built FTK system and components are described, as is the online software used to control them while running in the ATLAS data acquisition system. Also described is the simulation of the FTK hardware and the optimization of the AM pattern banks. An optimization for long-lived particles with large impact parameter values is included. A test of the FTK system with the data playback facility that allowed the FTK to be commissioned during the shutdown between Run 2 and Run 3 of the LHC is reported. The resulting tracks from part of the FTK system covering a limited eta-phi region of the detector are compared with the output from the FTK simulation. It is shown that FTK performance is in good agreement with the simulation.
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3.
  • Mullier, G.A., et al. (författare)
  • Search for Lepton-Flavor Violation in Z -Boson Decays with τ Leptons with the ATLAS Detector
  • 2021
  • Ingår i: Physical Review Letters. - : American Physical Society (APS). - 0031-9007 .- 1079-7114. ; 127:27
  • Tidskriftsartikel (refereegranskat)abstract
    • A search for lepton-flavor-violating Z→eτ and Z→μτ decays with pp collision data recorded by the ATLAS detector at the LHC is presented. This analysis uses 139 fb-1 of Run 2 pp collisions at s=13 TeV and is combined with the results of a similar ATLAS search in the final state in which the τ lepton decays hadronically, using the same data set as well as Run 1 data. The addition of leptonically decaying τ leptons significantly improves the sensitivity reach for Z→ℓτ decays. The Z→ℓτ branching fractions are constrained in this analysis to B(Z→eτ)
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  • Resultat 1-3 av 3

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