The Weak Nuclear Force

The weak nuclear force causes neutrons to change into protons in β-minus decay and causes protons to change into neutrons in β-plus decay.It is weaker than the strong nuclear force so does not affect stable nuclei.In beta decay a particle and an antiparticle are created.In beta-minus decay the particle is an electron and the antiparticle is an antineutrino.In beta-plus decay the particle is a neutrino and the antiparticle is a positron.
Neutrinos and antineutrinos rarely interact with other particles.They interact due to the exchange of W bosons.Neutrinos and anti-neutrinos do not interact much with other particles but some interactions happen.A neutrino can interact with a neutron and cause it to change to a proton. A beta minus particle is created as a result.An antineutrino can interact with a proton and cause it to change to a neutron. A beta plus particle is created as a result.