New constraints on oscillation parameters from {nu}e appearance and {nu}{mu} disappearance in the NOvA experiment

Acero, M. A.; Adamson, P; Aliaga, L.; Alion, T.; Allakhverdian, V.; Anfimov, N.; Antoshkin, A.; Arrieta-Diaz, Enrique; Aurisano, A.; Back, A.; Dharmapalan, R.; Djurcic, Z.; Goodman, M. C.; Magill, S.; Talaga, R. L.

doi:10.1103/PhysRevD.98.032012

New constraints on oscillation parameters from {nu}e appearance and {nu}{mu} disappearance in the NOvA experiment

Journal Article · 24 August 2018 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.98.032012· OSTI ID:1577436

Acero, M. A.; Adamson, P; Aliaga, L.; Alion, T.; Allakhverdian, V.; Anfimov, N.; Antoshkin, A.; Arrieta-Diaz, Enrique; Aurisano, A.; Back, A.; Dharmapalan, R.; Djurcic, Z.; Goodman, M. C.; Magill, S.; Talaga, R. L.

We present updated results from the NOvA experiment for v(mu) -> v(mu) and v(mu) -> v(e) oscillations from an exposure of 8.85 x 10(20) protons on target, which represents an increase of 46% compared to our previous publication. The results utilize significant improvements in both the simulations and analysis of the data. A joint fit to the data for v(mu) disappearance and v(e) appearance gives the best-fit point as normal mass hierarchy, Delta m(32)(2) = 2.44 x 10(-3) eV(2)/c(4), sin(2) theta(23) = 0.56, and delta(CP) = 1.21 pi. The 68.3% confidence intervals in the normal mass hierarchy are Delta m(32)(2) is an element of[2.37, 2.52] x 10(-3) eV(2)/c(4) , sin(2) theta(23) is an element of [0.43; 0.51] boolean OR [0.52; 0.60], and delta(CP) is an element of [0, 0.21 pi] boolean OR [0.91 pi, 2 pi]. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science - Office of High Energy Physics; National Science Foundation (NSF); India Department of Science and Technology

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1577436

Journal Information:: Physical Review D, Vol. 98, Issue 3

Country of Publication:: United States

Language:: English

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