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Limits on sterile neutrino mixing using atmospheric neutrinos in Super-Kamiokande

Author
Abe, K.; Labarga Echeverría, Luis Alfonsountranslated; Fernández, P.; Super-Kamiokande Collaboration
Entity
UAM. Departamento de Física Teórica
Publisher
American Physical Society
Date
2015-03-24
Citation
10.1103/PhysRevD.91.052019
Physical Review D 91.5 (2015): 052019
 
 
 
ISSN
1550-7998 (print); 1550-2368 (online)
DOI
10.1103/PhysRevD.91.052019
Funded 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 Canada
Project
info:eu-repo/grantAgreement/EC/FP7/284518; info:eu-repo/grantAgreement/EC/FP7/289442
Editor's Version
http://dx.doi.org/10.1103/PhysRevD.91.052019
Subjects
Física
URI
http://hdl.handle.net/10486/674574
Note
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 UAM
Rights
© 2015 American Physical Society

Abstract

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
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Google™ Scholar:Abe, K. - Labarga Echeverría, Luis Alfonso - Fernández, P. - Super-Kamiokande Collaboration

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  • Producción científica en acceso abierto de la UAM [15086]

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Universidad Autónoma de Madrid. Biblioteca
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