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Title: Correlated, precision measurements of θ 23 and δ using only the electron neutrino appearance experiments

Precision measurement of the leptonic CP violating phase δ will suffer from the, then surviving, large uncertainty of sin 2θ 23 of 10–20% in the experimentally interesting region near maximal mixing of θ 23. We advocate a new method for determination of both θ 23 and δ at the same time using only the ν e and ν̄ e appearance channels and show that sin 2θ 23 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 θ 23 and δ, the θ 23 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.
Publication Date:
Publisher's Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Related Information: CHORUS Timestamp: 2017-04-06 12:25:42; Journal ID: ISSN 1550-7998
American Physical Society
Sponsoring Org:
Country of Publication:
United States
OSTI Identifier: