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Search for heavy Majorana neutrinos with the ATLAS detector in pp collisions at root s=8 TeV
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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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
2015. no 7, 162
Keyword [en]
Hadron-Hadron Scattering
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-120083DOI: 10.1007/JHEP07(2015)162ISI: 000358928700001OAI: oai:DiVA.org:su-120083DiVA: diva2:851662
Available from: 2015-09-07 Created: 2015-09-01 Last updated: 2017-12-04Bibliographically approved

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Abulaiti, YimingÅkerstedt, HenrikÅsman, BarbroBendtz, KatarinaBertoli, GabrieleBessidskaia Bylund, OlgaBohm, ChristianClément, ChristopheCribbs, Wayne A.Eriksson, DanielHellman, StenJon-And, KerstinKhandanyan, HovhannesKim, HyeonKlimek, PawelLundberg, OlofMilstead, David A.Moa, TorbjörnMolander, SimonPani, PriscillaPetridis, AndreasPlucinski, PawelRossetti, ValerioShcherbakova, AnnaSilverstein, Samuel B.Sjölin, JörgenStrandberg, SaraTylmad, Maja
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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