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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Restricting the LSND and MiniBooNE sterile neutrinos with the IceCube atmospheric neutrino data

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Autor(es):
Esmaili, Arman [1] ; Smirnov, Alexei Yu. [2]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Inst Fis Gleb Wataghin UNICAMP, BR-13083859 Campinas, SP - Brazil
[2] Abdus Salaam Int Ctr Theoret Phys, Abdus Salam Int Ctr Theoret Phys, I-34010 Trieste - Italy
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Journal of High Energy Physics; n. 12 DEC 2 2013.
Citações Web of Science: 19
Resumo

We study oscillations of the high energy atmospheric neutrinos in the Earth into sterile neutrinos with the eV-scale mass. The MSW resonance and parametric enhancement of the (nu) over bar (mu) -> (nu) over bar (s) oscillations lead to distortion of the zenith angle distribution of the muon-track events which can be observed by IceCube. Due to matter effect, the IceCube signal depends not only on the mixing element U-mu 4 relevant for LSND and MiniBooNE but also on U-tau 4 and the CP-violating phase delta(24). We show that the case with U-tau 4 = delta(24) = 0 leads to the weakest IceCube signal and therefore should be used to bound U-mu 4. We compute the zenith angle distributions of the nu(mu)-events for different energy intervals in the range (0.1 - 10) TeV and find that inclusion of the energy information (binning in energy) improves the sensitivity to nu(s) drastically. We estimate that with already collected (during 3 - 4 years) IceCube statistics the bound vertical bar U-mu 4 vertical bar(2) < 0.01 (99% C.L.) can be established and the mixing required by LSND and MiniBooNE can be excluded at (4-6)sigma confidence level. (AU)

Processo FAPESP: 09/17924-5 - Fenomenologia de neutrinos em telescópios de neutrinos
Beneficiário:Arman Esmaili Taklimi
Linha de fomento: Bolsas no Brasil - Pós-Doutorado