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Title: Search for right-handed W bosons and heavy neutrinos with the ATLAS experiment
Author: Hoad, Xanthe
ISNI:       0000 0004 7969 0330
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2019
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A search for heavy right-handed Majorana or Dirac neutrinos (NR) and heavy right-handed W gauge bosons (WR) participating in the Keung-Senjanovi´c process has been performed in events with a pair of energetic electrons or muons, with opposite-sign charges, and two energetic jets. Events were selected from pp collision data with an integrated luminosity of 36.1fb−1 collected by the ATLAS detector at √s = 13TeV. No significant deviations from the Standard Model expectation were observed. The results were interpreted within the theoretical frameworks of two forms of Left-Right Symmetric Model and lower limits were set on masses in the heavy right-handed W and neutrino mass plane, as well as upper limits on the Keung-Senjanovi´c process cross section multiplied by the branching fraction to eejj or µµjj. The excluded region extends to mWR = 4.7TeV for both Majorana and Dirac NR neutrinos. The mNR > mWR region is explored for the first time by a search for the Keung-Senjanovi´c process at the LHC.
Supervisor: Leonidopoulos, Christos ; Martin, Victoria Sponsor: Science and Technology Facilities Council (STFC)
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Dirac neutrinos ; W gauge bosons ; Large Hadron Collider ; Left-Right Symmetric Model right-handed boson ; neutrinos ; Standard Model