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Non-unitarity, sterile neutrinos, and non-standard neutrino interactions
KTH, School of Engineering Sciences (SCI), Applied Physics.ORCID iD: 0000-0001-5948-9152
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2017 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 4, 153Article in journal (Refereed) Published
Abstract [en]

The simplest Standard Model extension to explain neutrino masses involves the addition of right-handed neutrinos. At some level, this extension will impact neutrino oscillation searches. In this work we explore the differences and similarities between the case in which these neutrinos are kinematically accessible (sterile neutrinos) or not (mixing matrix non-unitarity). We clarify apparent inconsistencies in the present literature when using different parametrizations to describe these effects and recast both limits in the popular neutrino non-standard interaction (NSI) formalism. We find that, in the limit in which sterile oscillations are averaged out at the near detector, their effects at the far detector coincide with non-unitarity at leading order, even in presence of a matter potential. We also summarize the present bounds existing in both limits and compare them with the expected sensitivities of near-future facilities taking the DUNE proposal as a benchmark. We conclude that non-unitarity effects are too constrained to impact present or near future neutrino oscillation facilities but that sterile neutrinos can play an important role at long baseline experiments. The role of the near detector is also discussed in detail.

Place, publisher, year, edition, pages
Springer, 2017. no 4, 153
Keyword [en]
Beyond Standard Model, Neutrino Physics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-207671DOI: 10.1007/JHEP04(2017)153ISI: 000400270600001Scopus ID: 2-s2.0-85018388064OAI: oai:DiVA.org:kth-207671DiVA: diva2:1104878
Funder
EU, FP7, Seventh Framework Programme, PCIG11-GA-2012-321582EU, Horizon 2020, H2020-MSCA-ITN2015/674896-Elusives H2020-MSCA-RISE-2015/690575-InvisiblesPlus
Note

QC 20170602

Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-11-10Bibliographically approved

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Blennow, Mattias

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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More styles
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  • de-DE
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  • en-US
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  • nn-NB
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  • Other locale
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Output format
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