Neutrino physics is the only field to provide signals of physics Beyond the Standard Model (BSM) of particles and interactions. Neutrino oscillations have been confirmed in solar, atmospheric, accelerator and reactor neutrinos. These have lead to the determination of the neutrino mass-eigenvalue differences (squared) and of the mixing angles of the Pontecorvo-Maki-Nakagawa-Sakata matrix. CP violation in the leptonic sector and the hierarchy of the neutrino mass eigenvalues remain to be determined. As well as the possibility of yet undetected sterile neutrinos, potentially arising from the freedom of the number of mass eigenstates.

To achieve the necessary sensitivity in the forthcoming searches and measurements, large samples of events will be required. This condition can only be satisfied by the use of both high-flux neutrino beams and very large mass detectors with efficient background discrimination. TPCs are three-dimensional tracking devices with excellent calorimetric and particle identification capabilities. Large liquid argon TPCs are an ideal detection technology, also well suited for astroparticle physics topics and sensitive searches for proton decay.

ArgonCube is intended to evolve liquid Argon TPC technology in view of the next generation of experiments and of their possible upgrades. ArgonCube will investigate the feasibility of a modular TPC design and a novel alternative to the standard wire readout. This approach is well matched to the requirements of future multi-kiloton neutrino observatories, it also offers viable upgrades to smaller scale detectors.

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