| Texto completo | |
| Autor(es): |
Esmaili, A.
;
Gratieri, D. R.
;
Guzzo, M. M.
;
de Holanda, P. C.
;
Peres, O. L. G.
;
Valdiviesso, G. A.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Review D; v. 89, n. 11, p. 13-pg., 2014-06-11. |
| 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: | 09/17924-5 - Fenomenologia de neutrinos em telescópios de neutrinos |
| Beneficiário: | Arman Esmaili Taklimi |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 12/16389-1 - Fenomenologia de neutrinos |
| Beneficiário: | Orlando Luis Goulart Peres |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |