Ok, thank you @mfb. In what way does it allow it? By the creation of a virtual boson to transfer the mass and charge?
@vanhees71 but it is carried by a virtual boson?
I am familiar with the proton:neutron ratio and stability but what about this instability actually causes a quark to emit a boson and change flavour?
And what does this have to do with the weak nuclear force?
Thanks