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Search for heavy Majorana neutrinos with the ATLAS detector in pp collisions at root s=8 TeV
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 2821
2015 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 7, 162Article in journal (Refereed) Published
Abstract [en]

A search for heavy Majorana neutrinos in events containing a pair of high-p(T) leptons of the same charge and high-p(T) jets is presented. The search uses 20.3 fb(-1) of pp collision data collected with the ATLAS detector at the CERN Large Hadron Collider with a centre-of-mass energy of root s = 8TeV. The data are found to be consistent with the background-only hypothesis based on the Standard Model expectation. In the context of a Type-I seesaw mechanism, limits are set on the production cross-section times branching ratio for production of heavy Majorana neutrinos in the mass range between 100 and 500 GeV. The limits are subsequently interpreted as limits on the mixing between the heavy Majorana neutrinos and the Standard Model neutrinos. In the context of a left-right symmetric model, limits on the production cross-section times branching ratio are set with respect to the masses of heavy Majorana neutrinos and heavy gauge bosons W-R and Z'.

Place, publisher, year, edition, pages
Springer, 2015. no 7, 162
Keyword [en]
Hadron-Hadron Scattering
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-173874DOI: 10.1007/JHEP07(2015)162ISI: 000358928700001Scopus ID: 2-s2.0-84978025369OAI: oai:DiVA.org:kth-173874DiVA: diva2:855544
Funder
Swedish Research Council
Note

QC 20150921

Available from: 2015-09-21 Created: 2015-09-21 Last updated: 2017-12-04Bibliographically approved

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Strandberg, Jonas

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  • apa
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