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dc.contributor.advisorLeonidopoulos, Christos
dc.contributor.advisorMartin, Victoria
dc.contributor.authorHoad, Xanthe
dc.date.accessioned2019-07-02T10:59:15Z
dc.date.available2019-07-02T10:59:15Z
dc.date.issued2019-07-01
dc.identifier.urihttp://hdl.handle.net/1842/35674
dc.description.abstractA 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.en
dc.contributor.sponsorScience and Technology Facilities Council (STFC)en
dc.language.isoenen
dc.publisherThe University of Edinburghen
dc.relation.hasversionATLAS Collaboration, X. Hoad, Trigger Menu-aware Monitoring for the ATLAS experiment, J. Phys. Conf. Ser. 898 (2017) 092007. (Cited on pages v, 55, and 58.)en
dc.relation.hasversionX. Hoad, Summary of LRSM model updates by F. Nesti and M. Nemevˇsek, 2016, https://indico.cern.ch/event/570893/contributions/ 2309254/attachments/1341184/2019971/20160922Modelling.pdf, ATLAS internal (accessed 26/06/18)en
dc.relation.hasversionX. Hoad, S. Hou, C. Leonidopoulos, B. Li, E. Carquin et al., Search for heavy Majorana or Dirac neutrinos and right-handed W gauge bosons in final states with two charged leptons and two jets at √s=13 TeV with the ATLAS collaboration, Tech. Rep. ATL-COM-PHYS-2017-704, CERN, Geneva, Jun, 2017. https://cds.cern.ch/record/2267874. ATLAS internal.en
dc.subjectDirac neutrinosen
dc.subjectW gauge bosonsen
dc.subjectLarge Hadron Collideren
dc.subjectLeft-Right Symmetric Model right-handed bosonen
dc.subjectneutrinosen
dc.subjectStandard Modelen
dc.titleSearch for right-handed W bosons and heavy neutrinos with the ATLAS experimenten
dc.typeThesis or Dissertationen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD Doctor of Philosophyen


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