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Scientific article
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English

Search for heavy Majorana or Dirac neutrinos and right-handed W gauge bosons in final states with charged leptons and jets in pp collisions at √s = 13 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inEuropean physical journal. C, Particles and fields, vol. 83, no. 12, 1164
Publication date2023
First online date2023-12-20
Abstract

A search for heavy right-handed Majorana or Dirac neutrinos $N_{\textrm{R}}$ and heavy right-handed gauge bosons $W_{\textrm{R}}$ is performed in events with energetic electrons or muons, with the same or opposite electric charge, and energetic jets. The search is carried out separately for topologies of clearly separated final-state products (“resolved” channel) and topologies with boosted final states with hadronic and/or leptonic products partially overlapping and reconstructed as a large-radius jet (“boosted” channel). The events are selected from pp collision data at the LHC with an integrated luminosity of 139 fb$^{-1}$ collected by the ATLAS detector at $\sqrt{s} = 13$ TeV. No significant deviations from the Standard Model predictions are observed. The results are interpreted within the theoretical framework of a left-right symmetric model, and lower limits are set on masses in the heavy right-handed $W_{\textrm{R}}$ boson and $N_{\textrm{R}}$ plane. The excluded region extends to about $m(W_{\textrm{R}}) = 6.4$ TeV for both Majorana and Dirac $N_{\textrm{R}}$ neutrinos at $m(N_{\textrm{R}})<1$ TeV. $N_{\textrm{R}}$ with masses of less than 3.5 (3.6) TeV are excluded in the electron (muon) channel at $m(W_{\textrm{R}})=4.8$ TeV for the Majorana neutrinos, and limits of $m(N_{\textrm{R}})$ up to 3.6 TeV for $m(W_{\textrm{R}}) = 5.2$ (5.0) TeV in the electron (muon) channel are set for the Dirac neutrinos. These constitute the most stringent exclusion limits to date for the model considered.

eng
Keywords
  • P p: colliding beams
  • Neutrino: Dirac
  • P p: scattering
  • Neutrino: Majorana
  • Neutrino: right-handed
  • Gauge boson: right-handed
  • Charge: electric
  • Final state: ((n)jet lepton)
  • Muon
  • Electron
  • ATLAS
  • Topology
  • Left-right
  • Gauge boson: mass
  • Neutrino: mass
  • Mass: lower limit
  • CERN LHC Coll
  • Statistical analysis
  • Data analysis method
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Search for heavy Majorana or Dirac neutrinos and right-handed <i>W </i>gauge bosons in final states with charged leptons and jets in <i>pp</i> collisions at √s = 13 TeV with the ATLAS detector. In: European physical journal. C, Particles and fields, 2023, vol. 83, n° 12, p. 1164. doi: 10.1140/epjc/s10052-023-12021-9
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Article (Published version)
Identifiers
ISSN of the journal1434-6044
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