Search for heavy charged long-lived particles in proton–proton collisions at √s = 13 TeV using an ionisation measurement with the ATLAS detector

Research output: Contribution to journalArticle

  • External authors:
  • Agni Bethani
  • Brian Cox
  • Jonathan Crane
  • Cinzia Da Via
  • Nicholas Dann
  • Alessandra Forti
  • David Lack
  • Jiri Masik
  • Stephen Menary
  • Alexander Oh
  • Emily Orgill
  • Joleen Pater
  • Yvonne Peters
  • Yang Qin
  • Jacob Rawling
  • Nicolas Scharmberg
  • Savanna Shaw
  • Stephen Watts
  • Terence Wyatt
  • The ATLAS Collaboration

Abstract

The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb −1 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy s=8 TeV. In the four-lepton invariant-mass range of 80<m 4ℓ <1000 GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be f DPS =0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb.

Bibliographical metadata

Original languageEnglish
Pages (from-to)96-116
Number of pages20
JournalPhysics Letters B
Volume788
Early online date1 Nov 2018
DOIs
Publication statusPublished - 10 Jan 2019