Quarks, which make up composite particles like neutrons and protons, come in six "flavours" up, down, charm, strange, top and bottom which give those composite particles their properties. The weak interaction is unique in that it allows quarks to swap their flavour for another. The swapping of those properties is mediated by the force carrier bosons. For example, during beta-minus decay, a down quark within a neutron is changed into an up quark, thus converting the neutron to a proton and resulting in the emission of an electron and an electron antineutrino.
Quarks, which make up composite particles like neutrons and protons, come in six "flavours" up, down, charm, strange, top and bottom which give those composite particles their properties. The weak interaction is unique in that it allows quarks to swap their flavour for another. The swapping of those properties is mediated by the force carrier bosons. For example, during beta,-minus decay, a down quark within a neutron is changed into an up quark, thus converting the neutron to a proton an,d resulting in the emission of an electron and an electron antineutrino.