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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.)

Measuring the leptonic CP phase in neutrino oscillations with nonunitary mixing

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Ge, Shao-Feng ; Pasquini, Pedro ; Tortola, M. ; Valle, J. W. F.
Total Authors: 4
Document type: Journal article
Source: Physical Review D; v. 95, n. 3 FEB 16 2017.
Web of Science Citations: 19

Non-unitary neutrino mixing implies an extra CP violating phase that can fake the leptonic Dirac CP phase delta(CP) of the simplest three-neutrino mixing benchmark scheme. This would hinder the possibility of probing for CP violation in accelerator-type experiments. We take T2K and T2HK as examples to demonstrate the degeneracy between the ``standard{''} (or ``unitary{''}) and ``nonunitary{''} CP phases. We find, under the assumption of nonunitary mixing, that their CP sensitivities severely deteriorate. Fortunately, the TNT2K proposal of supplementing T2(H)K with a mu DAR source for better measurement of delta(CP) can partially break the CP degeneracy by probing both cos delta(CP) and sin delta(CP) dependences in the wide spectrum of the mu DAR flux. We also show that the further addition of a near detector to the mu DAR setup can eliminate the degeneracy completely. (AU)

FAPESP's process: 14/19164-6 - Challenges in the 21st century in neutrino physics and astrophysics
Grantee:Orlando Luis Goulart Peres
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/16809-9 - Study of neutrino parameters and their consequences
Grantee:Pedro Simoni Pasquini
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 14/05133-1 - Flavor physics
Grantee:Pedro Simoni Pasquini
Support type: Scholarships in Brazil - Doctorate