To Secular Physicists, the Universe is a Self-Existent entity, composed of Self-Existent 'Matter' ... Because they think, Matter is essentially a Physical State ... and their Sciences think, Everything is made up of very small Particles, of Matter.
The Greeks called these the "Atomos" ... and their Progeny, Modern Science, calls these, the "Elementary Particles" ...
The Science, dealing with the Structure, the Distinct Characteristics, and Behavior, of these Particles of Matter, is called Particle Physics.
Particle Physics, is the Seculars Seeking vindication of their false Belief. Particle Physics basically looks into, How, Matter came to Exist.