00:01
Now we want to analyze these two feynmine diagrams and find out what are the mediating particles.
00:09
That is the particle that actually mediates the interaction so in between the two particles.
00:18
So over here, that's what we're interested in.
00:22
So for the left side, we start with the first feynman diagram on the left.
00:29
Now for this reaction, it is a scattering interaction.
00:32
Interaction.
00:35
We see that the charges remain the same for the electron and the neutrino.
00:42
So the neutrino is neutral.
00:45
The electron doesn't lose its charge and so from that we can infer that the interacting particle must be neutral.
00:55
Right, and no electric charge.
01:01
Next we know that neutrinos interact only through weak interaction...