A search for prompt lepton-jets in pp collisions at root s=8 TeV with the ATLAS detector


Creative Commons License

Aad G., Abbott B., Abdallah J., Abdinov O., Aben R., Abolins M., ...More

JOURNAL OF HIGH ENERGY PHYSICS, vol.2016, no.2, pp.1-51, 2016 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 2016 Issue: 2
  • Publication Date: 2016
  • Doi Number: 10.1007/jhep02(2016)062
  • Journal Name: JOURNAL OF HIGH ENERGY PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1-51
  • Keywords: Hadron-Hadron scattering, VECTOR GAUGE BOSON, PHI-MESON DECAYS, EXCLUSION LIMITS, DARK PHOTON, E(+)E(-), FORCES
  • Gazi University Affiliated: No

Abstract

A search is presented for a new, light boson with a mass of about 1 GeV and decaying promptly to jets of collimated electrons and/or muons (lepton-jets). The analysis is performed with 20.3 fb(-1) of data collected by the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a centre-of-mass energy of 8 TeV. Events are required to contain at least two lepton-jets. This study finds no statistically significant deviation from predictions of the Standard Model and places 95% confidence-level upper limits on the contribution of new phenomena beyond the SM, incuding SUSY-portal and Higgs-portal models, on the number of events with lepton-jets.