Definition: the union of a particle and its anti-particle is called a photon. We reserve the Greek letter γ to note this type of compound quark.

Photons have perfect symmetry between quarks and anti-quarks, Δnq = 0 for all q. So photons have no inertia, enthalpy, charge or mass. Photons are aethereal. The momentum of a P-type photon depends on the frame-of-reference used for a description; its direction of motion is always along an axis set by the average inertia of the frame, with the sign depending on the phase

The mechanical energy of a photon is

The position of a photon is not defined, except when absorbed into a material particle.
| Quark Coefficients |
| Photon | u | d | e | g | m | a | t | b | s | c | u | d | e | g | m | a | t | b | s | c |
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4 | 4 | 4 | 4 | 4 | 4 | ||||||||||||||
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4 | 21 | 2 | 4 | 21 | 2 | ||||||||||||||
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4 | 5 | 2 | 2 | 4 | 5 | 2 | 2 | ||||||||||||
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4 | 51 | 2 | 5 | 4 | 51 | 2 | 5 |
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| electronic photon
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| Notice: construction ahead |






