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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 6
[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
Total Affiliations: 5
Document type: Journal article
Source: Physical Review D; v. 89, n. 11 JUN 11 2014.
Web of Science Citations: 9

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)

FAPESP's process: 12/16389-1 - Neutrino phenomenology
Grantee:Orlando Luis Goulart Peres
Support type: Regular Research Grants
FAPESP's process: 09/17924-5 - Neutrino phenomenology in neutrino telescopes
Grantee:Arman Esmaili Taklimi
Support type: Scholarships in Brazil - Post-Doctorate