Tools for estimating fake/non-prompt lepton backgrounds with the ATLAS detector at the LHC

Collaboration
Nov 29, 2022
62 pages
Published in:
  • JINST 18 (2023) 11, T11004
  • Published: Nov 30, 2023
e-Print:
Report number:
  • CERN-EP-2022-214
Experiments:

Citations per year

202220232024202532646
Abstract: (IOP)
Measurements and searches performed with the ATLAS detector at the CERN LHC often involve signatures with one or more prompt leptons. Such analysesare subject to `fake/non-prompt' lepton backgrounds, where either a hadron or a lepton from a hadron decay or an electron from a photon conversion satisfies the prompt-leptonselection criteria. These backgrounds often arise within a hadronic jet because of particle decays in the showering process, particle misidentification or particleinteractions with the detector material. As it is challenging to model these processes with high accuracy in simulation, their estimation typically uses data-driven methods.Three methods for carrying out this estimation are described, along with their implementation in ATLAS and their performance.
Note:
  • Analysis and statistical methods
  • Particle identification methods
  • p p: scattering
  • p p: colliding beams
  • jet: hadronic
  • photon: transition
  • hadron: decay
  • particle: interaction
  • lepton: particle identification
  • background