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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.)

Constraining the violation of the equivalence principle with IceCube atmospheric neutrino data

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Autor(es):
Esmaili, A. [1, 2] ; Gratieri, D. R. [1, 3] ; Guzzo, M. M. [1] ; de Holanda, P. C. [1] ; Peres, O. L. G. [1, 4] ; Valdiviesso, G. A. [5]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Seoul Natl Univ Sci & Technol, Inst Convergence Fundamental Studies, Seoul 139743 - South Korea
[3] Univ Fed Pelotas, Inst Fis & Mat, High & Medium Energy Grp, BR-96010900 Pelotas, RS - Brazil
[4] Abdus Salaam Int Ctr Theoret Phys, Abdus Salam Int Ctr Theoret Phys, I-34010 Trieste - Italy
[5] Univ Fed Alfenas, Unifal MG, Inst Ciencia & Tecnol, BR-37715400 Pocos De Caldas, MG - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: Physical Review D; v. 89, n. 11 JUN 11 2014.
Citações Web of Science: 9
Resumo

The recent high-statistics high-energy atmospheric neutrino data collected by IceCube open a new window to probe new physics scenarios that are suppressed in lower-energy neutrino experiments. In this paper we analyze the IceCube atmospheric neutrino data to constrain the violation of equivalence principle (VEP) in the framework of three neutrinos with nonuniversal gravitational couplings. In this scenario the effect of the VEP on neutrino oscillation probabilities can be parametrized by two parameters, Delta gamma(21) equivalent to gamma(2) - gamma(1) and Delta gamma(31) equivalent to gamma(3) - gamma(1), where gamma(i)'s denote the coupling of neutrino mass eigenstates to the gravitational field. By analyzing the latest muon-tracks data sets of IceCube-40 and IceCube-79, besides providing the two-dimensional allowed regions in the (phi Delta gamma(21), phi Delta gamma(31)) plane, we obtain the upper limits vertical bar phi Delta gamma(21)vertical bar < 9.1 x 10(-27) (at 90% C.L.), which improves the previous limit by similar to 4 orders of magnitude, and vertical bar phi Delta gamma(31)vertical bar less than or similar to 6 x 10(-27) (at 90% C.L.), which improves the current limit by similar to 1 order of magnitude. Also we discuss in detail and analytically the effect of the VEP on neutrino oscillation probabilities. (AU)

Processo FAPESP: 12/16389-1 - Fenomenologia de neutrinos
Beneficiário:Orlando Luis Goulart Peres
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 09/17924-5 - Fenomenologia de neutrinos em telescópios de neutrinos
Beneficiário:Arman Esmaili Taklimi
Linha de fomento: Bolsas no Brasil - Pós-Doutorado