ATLAS Collaboration (Including: Beckingham, M., Farrington, Sinead, Harrison, P. F., Janus, M., Jeske, C., Jones, G. (Graham), Martin, T. A., Murray, W. and Pianori, E.). (2015) Search for heavy Majorana neutrinos with the ATLAS detector in pp collisions at s=8 TeV. Journal of High Energy Physics, 2015 (7). 162. doi:10.1007/jhep07(2015)162

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Abstract

A search for heavy Majorana neutrinos in events containing a pair of high-pT leptons of the same charge and high-pT 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 s=8 TeV. 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 WR and Z′.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
SWORD Depositor:	Library Publications Router
Library of Congress Subject Headings (LCSH):	Hadrons -- Scattering, Neutrinos, Particles (Nuclear physics)
Journal or Publication Title:	Journal of High Energy Physics
Publisher:	Springer Berlin Heidelberg
ISSN:	1029-8479
Official Date:	29 July 2015
Dates:	Date Event 29 July 2015 Published 5 July 2015 Accepted
Volume:	2015
Number:	7
Article Number:	162
DOI:	10.1007/jhep07(2015)162
Status:	Peer Reviewed
Publication Status:	Published
Publisher Statement:
Access rights to Published version:	Open Access
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UNSPECIFIED [CNRS] Centre National de la Recherche Scientifique http://dx.doi.org/10.13039/501100004794 UNSPECIFIED [CEA] Commissariat à l'Énergie Atomique et aux Énergies Alternatives http://dx.doi.org/10.13039/501100006489 UNSPECIFIED Institut de recherche sur les lois fondamentales de l'univers UNSPECIFIED UNSPECIFIED Shota Rustaveli National Science Foundation http://dx.doi.org/10.13039/501100004801 UNSPECIFIED Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347 UNSPECIFIED Helmholtz-Gemeinschaft http://dx.doi.org/10.13039/501100001656 UNSPECIFIED Max-Planck-Gesellschaft http://dx.doi.org/10.13039/501100004189 UNSPECIFIED Alexander von Humboldt-Stiftung http://dx.doi.org/10.13039/100005156 UNSPECIFIED General Secretariat for Research and Technology http://dx.doi.org/10.13039/501100003448 UNSPECIFIED Research Grants Council, University Grants Committee http://dx.doi.org/10.13039/501100002920 UNSPECIFIED Israel Science Foundation http://dx.doi.org/10.13039/501100003977 UNSPECIFIED Minerva Foundation http://dx.doi.org/10.13039/501100001658 UNSPECIFIED German-Israeli Foundation for Scientific Research and Development http://dx.doi.org/10.13039/501100001736 UNSPECIFIED UNSPECIFIED http://viaf.org/viaf/311794638 UNSPECIFIED Weizmann Institute of Science http://dx.doi.org/10.13039/501100001735 UNSPECIFIED [INFN] Instituto Nazionale di Fisica Nucleare http://dx.doi.org/10.13039/501100004007 UNSPECIFIED [MEXT] Ministry of Education, Culture, Sports, Science and Technology http://dx.doi.org/10.13039/501100001700 UNSPECIFIED [JSPS] Japan Society for the Promotion of Science http://dx.doi.org/10.13039/501100001691 UNSPECIFIED Centre National pour la Recherche Scientifique et Technique http://dx.doi.org/10.13039/501100006319 UNSPECIFIED [NWO] Nederlandse Organisatie voor Wetenschappelijk Onderzoek http://dx.doi.org/10.13039/501100003246 UNSPECIFIED Norges Forskningsråd http://dx.doi.org/10.13039/501100005416 UNSPECIFIED Ministerstwo Nauki i Szkolnictwa Wyższego http://dx.doi.org/10.13039/501100004569 UNSPECIFIED Narodowe Centrum Nauki http://dx.doi.org/10.13039/501100004281 UNSPECIFIED Fundação para a Ciência e a Tecnologia http://dx.doi.org/10.13039/501100001871 UNSPECIFIED UNSPECIFIED http://viaf.org/viaf/154740159 UNSPECIFIED [MES] Ministry of Education and Science of the Russian Federation http://dx.doi.org/10.13039/501100003443 UNSPECIFIED UNSPECIFIED http://viaf.org/viaf/125146937704813830418 UNSPECIFIED Joint Institute for Nuclear Research http://dx.doi.org/10.13039/501100003822 UNSPECIFIED Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja http://dx.doi.org/10.13039/501100004564 UNSPECIFIED Ministerstvo spravodlivosti UNSPECIFIED UNSPECIFIED Javna Agencija za Raziskovalno Dejavnost RS http://dx.doi.org/10.13039/501100004329 UNSPECIFIED Department of Science and Technology, Republic of South Africa http://dx.doi.org/10.13039/501100001342 UNSPECIFIED UNSPECIFIED http://viaf.org/viaf/137694659 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