Constraints on Oscillation Parameters from νe Appearance and νμ Disappearance in NOvA

Adamson, P and Aliaga, L and Ambrose, D and Anfimov, N and Antoshkin, A and Arrieta-Diaz, E and Augsten, K and Aurisano, A and Backhouse, C and Baird, M and Bambah, B A and Bays, K and Behera, B and Bending, S and Bernstein, R and Bhatnagar, V and Bhuyan, B and Bian, J and Blackburn, T and Bolshakova, A and Bromberg, C and Brown, J and Brunetti, G and Buchanan, N and Butkevich, A and Bychkov, V and Campbell, M and Catano-Mur, E and Childress, S and Choudhary, B C and Chowdhury, B and Coan, T E and Coelho, J A B and Colo, M and Cooper, J and Corwin, L and Cremonesi, L and Cronin-Hennessy, D and Davies, G S and Davies, J P and Derwent, P F and Dharmapalan, R and Ding, P and Djurcic, Z and Dukes, E C and Duyang, H and Edayath, S and Ehrlich, R and Feldman, G J and Frank, M J and Gabrielyan, M and Gallagher, H R and Germani, S and Ghosh, T and Giri, Anjan Kumar and et al, . (2017) Constraints on Oscillation Parameters from νe Appearance and νμ Disappearance in NOvA. Physical Review Letters, 118 (23). pp. 231801-1. ISSN 0031-9007

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Abstract

Results are reported from an improved measurement of nu(mu) -> nu(e) transitions by the NOvA experiment. Using an exposure equivalent to 6.05 x 10(20) protons on target, 33 nu(e) candidates are observed with a background of 8.2 +/- 0.8 (syst.). Combined with the latest NOvA nu(mu) disappearance data and external constraints from reactor experiments on sin(2) 2 theta(13), the hypothesis of inverted mass hierarchy with theta(23) in the lower octant is disfavored at greater than 93% C.L. for all values of delta(CP).

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