Correlated, precision measurements of θ₂₃ and δ using only the electron neutrino appearance experiments

Journal Article · Tue Jun 04 00:00:00 EDT 2013 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.87.113005· OSTI ID:1102804

Minakata, Hisakazu; Parke, Stephen J.

Precision measurement of the leptonic CP violating phase δ will suffer from the, then surviving, large uncertainty of sin²θ₂₃ of 10–20% in the experimentally interesting region near maximal mixing of θ₂₃. We advocate a new method for determination of both θ₂₃ and δ at the same time using only the ν_e and ν̄_e appearance channels and show that sin²θ₂₃ can be determined automatically with much higher accuracy, approximately a factor of six, than sinδ. In this method, we identify a new degeneracy for the simultaneous determination of θ₂₃ and δ, the θ₂₃ intrinsic degeneracy, which must be resolved in order to achieve precision measurement of these two parameters. Spectral information around the vacuum oscillation maxima is shown to be the best way to resolve this degeneracy.

• Sponsoring Organization: USDOE
• OSTI ID: 1102804
• Journal Information: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Vol. 87 Journal Issue: 11; ISSN 1550-7998
• Publisher: American Physical Society
• Country of Publication: United States
• Language: English