The establishment of the "neutrino oscillation" phenomenon provides full
explanation to both solar (driven by “Theta12") and atmospheric (driven
by “Theta23”) anomalies and one critical prediction: a new neutrino
oscillation (driven by “Theta13”). This new oscillation was expected to
be small thanks mainly to the CHOOZ (based in France) experiment data.
The observation of this new oscillation was first made within 2011-2012
by the experiments Daya Bay (based in China), Double Chooz (based in
France) and RENO (based in South Korea). A non-zero Theta13 was of
critical knowledge to the field since the mixing behind neutrino
oscillations could imply a measurable manifestation of CP-violation (CPV)
whose amplitude is proportional to the size of Theta13. This way the
neutrino mixing matrix (PMNS) ― equivalent to the quark (CKM) ― allows
for CPV manifestation upon mixing. CPV is key to our understanding of
the Universe since we observed an effective dominance of matter,
relative to anti-matter, upon the Big Bang. The cause behind is not
understood. As of today, our ability to challenge the Standard Model of
Particle Physics via neutrino oscillations is tightly linked to the
overall precision we can characterise the the PMNS matrix composition
and structure. A novel detection technique, called LiquidO ― born within
Double Chooz ― has been proposed as possible technique allowing
unprecedented further precision. In addition to the unknown CPV, one of
the key goals is to experimentally test the unitarity of the PMNS
matrix ― so far assumed. This scenario might have direct sensitivity to
the possible discovery of new neutrino states or interactions, should
any significant deviation be found. The exploration of this scenario ―
under preliminary study ― will be described as well as the possible role
of LiquidO technology might have within.