Limits on sterile neutrino mixing using atmospheric neutrinos in Super-Kamiokande
Entity
UAM. Departamento de Física TeóricaPublisher
American Physical SocietyDate
2015-03-24Citation
10.1103/PhysRevD.91.052019
Physical Review D 91.5 (2015): 052019
ISSN
1550-7998 (print); 1550-2368 (online)DOI
10.1103/PhysRevD.91.052019Funded by
The authors gratefully acknowledge the cooperation of the Kamioka Mining and Smelting Company. Super-K has been built and operated from funds provided by the Japanese Ministry of Education, Culture, Sports, Science and Technology, the U.S. Department of Energy, and the U.S. National Science Foundation. This work was partially supported by the Research Foundation of Korea (BK21 and KNRC), the Korean Ministry of Science and Technology, the National Science Foundation of China, the European Union FP7 (DS laguna-lbno PN- 284518 and ITN invisibles GA-2011-289442) the National Science and Engineering Research Council (NSERC) of Canada, and the Scinet and Westgrid consortia of Compute CanadaProject
info:eu-repo/grantAgreement/EC/FP7/284518; info:eu-repo/grantAgreement/EC/FP7/289442Editor's Version
http://dx.doi.org/10.1103/PhysRevD.91.052019Subjects
FísicaNote
Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMRights
© 2015 American Physical SocietyAbstract
We present limits on sterile neutrino mixing using 4,438 live-days of atmospheric neutrino data from the Super-Kamiokande experiment. We search for fast oscillations driven by an eV2-scale mass splitting and for oscillations into sterile neutrinos instead of tau neutrinos at the atmospheric mass splitting. When performing both of these searches we assume that the sterile mass splitting is large, allowing sin2(Δm2L/4E) to be approximated as 0.5, and we assume that there is no mixing between electron neutrinos and sterile neutrinos (|Ue4|2=0). No evidence of sterile oscillations is seen and we limit |Uμ4|2 to less than 0.041 and |Uτ4|2 to less than 0.18 for Δm2>0.1eV2 at the 90% C.L. in a 3+1 framework. The approximations that can be made with atmospheric neutrinos allow these limits to be easily applied to 3+N models, and we provide our results in a generic format to allow comparisons with other sterile neutrino models
Files in this item
Google Scholar:Abe, K.
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Labarga Echeverría, Luis Alfonso
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Fernández, P.
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Super-Kamiokande Collaboration
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