If we want to get the constituent of the Big Bang, we can suggest the photon as the option which is the smallest, lightest, fastest, and ... particle in the world. According to this particle, the volume and density of the Big Bang will be:

Where m_{T} is the total mass of universe, n is the number of photon, m_{p}, r_{p}, V_{p} and Ο_{p} are the mass, radius, volume and density of the photon and r_{BB}, V_{BB} and Ο_{BB} are the radius, volume and density of the Big Bang sphere.

Considering that the density of the Big Bang obtained by using photons is not more than 10^{15} ππ/π^{3} and the radius of the Big Bang sphere will be from the Earth to Jupiter. So, it could not be a suitable choice for the Big Bang, because it does not meet the definition that we expect for the Big Bang. In order to achieve our desired goal, we define a particle whose radius is one billionth of a photon, βCidtoniumβ. According to definition of this new particle we have:

Where m_{T} is the total mass of universe, n is the number of Cidtonium, r_{C}, V_{C} and Ο_{C} are the radius, volume and density of the Cidtonium and r^{Λ}_{BB}, V^{Λ}_{BB} and Ο^{Λ}_{BB} are the radius, volume and density of the Big Bang sphere based on Cidtonium.

It is clear that the size of the Big Bang sphere is about the Moon and the density is about 10^{42} ππ/π^{3}. Therefore, this particle could be a suitable choice for the nature of the Big Bang.

The defined particle is the same sub-photon, which its radius is 10^{-9} of a photon, or its volume is 10^{-27} of the volume of a photon.

density of the Big Bang
photon
Cidtonium
most condensed matter
size of the Big Bang

In this paper we defined a particle which named sub-photon that is one thousandth, one millionth, or one billionth of a photon in terms of radius. According to the calculations and definitions, it can be proved that there is a particle whose radius is one billionth of a photon's radius and its volume is 10 to the power of minus 27 meter of the photon's volume.

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In this paper we introduce a particle that is a subset of the photon, and its radius would be about 10^-9 times the radius of the photon that this particle has been the creator and constituent of the Big Bang.

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