Can someone basically teach me how to read/construct feynman diagrams?

Question

shaswatrajput · Answer

Feynman diagrams are pictorial representations of the mathematical expressions describing the behavior of subatomic particles.


In this Feynman diagram, an electron and a positron annihilate, producing a photon (represented by the blue sine wave) that becomes a quark–antiquark pair, after which the antiquark radiates a gluon (represented by the green helix).

nuttyliaczar · Answer

What's the significance of the gluon in this picture? I don't see a color change in the quark

shaswatrajput · Answer

Hi! Sorry for late reply.
Well feynman diagrams are simply the pictorial representation of mathematical expressions which describe the behavior of subatomic particles.
In above example, an electron and a positron combines to form quark and anti quark.
when electron and positron combine they produce a photon first which is represented by blue sine wave curve. This blue sine wave curve is actually a mathematical result which is pictorially represented by sine wave curve. Then this photon is divided into quark and anti quark. Anti-quark radiates which forms gluon, which is represented by green helical in above diagram. So, feynman diagrams are simply pictorial representation of matematical expressions.

shaswatrajput · Answer

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