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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
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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

G. Aad, B. Abbott, K. Abeling, N. J. Abicht, S. H. Abidi, A. Aboulhorma, H. Abramowicz, H. Abreu, Y. Abulaiti, A. C. Abusleme Hoffman, …
The European physical journal. C, Particles and fields, Vol.83(12), p.1164
12/20/2023
DOI: https://doi.org/10.1140/epjc/s10052-023-12021-9

Abstract

Astrophysics and Cosmology Elementary Particles Hadrons Heavy Ions Measurement Science and Instrumentation Nuclear Energy Physics and Astronomy Quantum Field Theories Regular Article - Experimental Physics Astronomy Nuclear Physics Physics Quantum Field Theory String Theory
A search for heavy right-handed Majorana or Dirac neutrinos N R and heavy right-handed gauge bosons W 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 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 R boson and N R plane. The excluded region extends to about m ( W R ) = 6.4  TeV for both Majorana and Dirac N R neutrinos at m ( N R ) < 1  TeV. N R with masses of less than 3.5 (3.6) TeV are excluded in the electron (muon) channel at m ( W R ) = 4.8  TeV for the Majorana neutrinos, and limits of m ( N R ) up to 3.6 TeV for m ( W 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.
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https://doi.org/10.1140/epjc/s10052-023-12021-9View
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