2020 Global reassessment of the neutrino oscillation picture
  We present an updated global fit of neutrino oscillation data in the simplest
three-neutrino framework. In the present study we include up-to-date analyses
from a number of experiments. Concerning the atmospheric and solar sectors, we
give updated analyses of DeepCore and SNO data, respectively. We have also
included the latest electron antineutrino data collected by the Daya Bay and
RENO reactor experiments, and the long-baseline T2K and NO$\nu$A measurements.
These new analyses result in more accurate measurements of $\theta_{13}$,
$\theta_{12}$, $\Delta m_{21}^2$ and $|\Delta m_{31}^2|$. The best fit value
for the atmospheric angle $\theta_{23}$ lies in the second octant, but first
octant solutions remain allowed at $\sim2.4\sigma$. Regarding CP violation
measurements, the preferred value of $\delta$ we obtain is 1.08$\pi$
(1.58$\pi$) for normal (inverted) neutrino mass ordering. The global analysis
prefers normal neutrino mass ordering with 2.5$\sigma$. This preference is
milder than the one found in previous global analyses. The new results should
be regarded as robust due to the agreement found between our Bayesian and
frequentist approaches. Taking into account only oscillation data, there is a
weak/moderate preference for the normal neutrino mass ordering of $2.00\sigma$.
While adding neutrinoless double beta decay from the latest Gerda, CUORE and
KamLAND-Zen results barely modifies this picture, cosmological measurements
raise the preference to $2.68\sigma$ within a conservative approach. A more
aggressive data set combination of cosmological observations leads to a similar
preference, namely $2.70\sigma$. This very same cosmological data set provides
$2\sigma$ upper limits on the total neutrino mass corresponding to
$\sum\nu<0.12$ ($0.15$)~eV for normal (inverted) neutrino mass ordering.
