Noun
Feynman diagram (plural Feynman diagrams)
(physics) A pictorial representation of the interactions of subatomic particles, showing their paths in space and time as lines, and their interactions as points where lines meet.
A Feynman diagram consists of points, called vertices, and lines attached to the vertices. Source: Internet
A Feynman diagram is a contribution of a particular class of particle paths, which join and split as described by the diagram. Source: Internet
An interaction as in a Feynman diagram is accepted as a calculationally convenient approximation where the outgoing legs are known to be simplifications of the propagation and the internal lines are for some order in an expansion of the field interaction. Source: Internet
Another example is the Feynman diagram formed from two X's where each X links up to two external lines, and the remaining two half-lines of each X are joined to each other. Source: Internet
Each Feynman diagram is the sum of exponentially many old-fashioned terms, because each internal line can separately represent either a particle or an antiparticle. Source: Internet
For example, consider the Feynman diagram formed from two external lines joined to one X, and the remaining two half-lines in the X joined to each other. Source: Internet