## New constraints on oscillation parameters from $ν_e$ appearance and $ν_μ$ disappearance in the NOvA experiment

Acero, M. A. ; Adamson, P. ; Aliaga, L. ; Alion, T. ; Allakhverdian, V. ; Anfimov, N. ; Antoshkin, A. ; Arrieta-Diaz, E. ; Aurisano, A. ; Back, A. ; Backhouse, C. ; Baird, M. ; Balashov, N. ; Bambah, B. A. ; Bays, K. ; Behera, B. ; Bending, S. ; Bernstein, R. ; Bhatnagar, V. ; Bhuyan, B. ; Bian, J. ; Blackburn, T. ; Blair, J. ; Bolshakova, A. ; Bour, P.

We present updated results from the NOvA experiment for $\nu_\mu\rightarrow\nu_\mu$ and $\nu_\mu\rightarrow\nu_e$ oscillations from an exposure of $8.85\times10^{20}$ 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 $ν_μ$ disappearance and $ν_e$ appearance gives the best fit point as normal mass hierarchy, $\Delta m^2_{32} = 2.44\times 10^{-3}{{\rm eV}^2}/c^4$, $\sin^2\theta_{23} = 0.56$, and $\delta_{CP} = 1.21\pi$. The 68.3% confidence intervals in the normal mass hierarchy are $\Delta m^2_{32} \in [2.37,2.52]\times 10^{-3}{{\rm eV}^2}/c^4$, $\sin^2\theta_{23} \in [0.43,0.51] \cup [0.52,0.60]$, and $\delta_{CP} \in [0,0.12\pi] \cup [0.91\pi,2\pi]$. The inverted mass hierarchy is disfavored at the 95% confidence level for all choices of the other oscillation parameters.

Publication Date:
Aug 24 2018
Date Submitted:
Jul 01 2019
Pagination:
32012
ISSN:
2470-0010
Citation:
Physical Review D
D98
External Resources: