Neutral current

The discovery of weak neutral currents was a significant step toward the unification of electromagnetism and the weak force into the electroweak force, and led to the discovery of the W and Z bosons.

It has very short range but (apart from gravity) is the only force to interact with neutrinos.

However the word "current" here has nothing to do with electricity – it simply refers to the exchange of the Z particle.

[1] The Z boson's neutral current interaction is determined by a derived quantum number called weak charge, which acts similarly to weak isospin for interactions with the W bosons.

denotes the weak isospin of the fermions, Q their electric charge and

These couplings amount to essentially left chiral for neutrinos and axial for charged leptons.

Particle accelerators with energies necessary to observe neutral current interactions and to measure the mass of Z boson weren't available until 1983.

Weak neutral currents were predicted by electroweak theory developed mainly by Abdus Salam, John Clive Ward, Sheldon Glashow and Steven Weinberg,[3] and confirmed shortly thereafter in 1973, in a neutrino experiment in the Gargamelle bubble chamber at CERN.