Improved measurement of neutrino oscillation parameters by the NOvA experiment

We present new e , , e , and oscillation measurements by the NOvA experiment, with a 50% increase in neutrino-mode beam exposure over the previously reported results. The additional data, combined with previously published neutrino and antineutrino data, are all analyzed using improved techniques and simulations. A joint fit to the e , , e , and candidate samples within the 3-flavor neutrino oscillation framework continues to yield a best-fit point in the normal mass ordering and the upper octant of the 23 mixing angle, with m 2 32 2.41 AE 0.07 10 -3 eV 2 and sin 2 23 0.57 0.03 -0.04 . The data disfavor combinations of oscillation parameters that give rise to a large asymmetry in the rates of e and e appearance. This includes values of the charge parity symmetry (CP) violating phase in the vicinity of CP =2 which are excluded by > 3 for the inverted mass ordering, and values around CP 3=2 in the normal ordering which are disfavored at 2 confidence.