8. Conclusion

The Standard Model of Particle Physics is the most accepted way to explain how particles behave and the forces that affect them. According to this model, the elementary particles are further grouped into quarks, leptons and gauge bosons with the Higgs boson having a special status as a non-gauge boson. Of these particles that make up an atom, only th electron is an elementary particle which is the first fermion to be discovered. Protons and neutrons are made up of quarks bounded by gluons. Gluons and photons are the only elementary particles with zero mass and no charge. The photon is the first boson to be discovered and the only boson that does not decay.

Hypothetical Graviton Bosons

The Standard Model includes all of the elementary particles described earlier. All these particles have been observed in the laboratory. The Standard model does not talk about gravity. If gravity works like the three other fundamental forces, then gravity is carried by the hypothetical boson called graviton. The graviton is yet to be found, so it is not included in the table of the Standard Model of the particle physics.