Subatomic particle

The Standard Model is a scientific theory that reveals the fundamental composition of the universe, consisting of 17 elementary particles, divided into matter particles (the basis of matter) and propagating particles (the medium for transmitting natural forces), as well as the Higgs boson that gives mass. Material particles: divided into three generations, each containing 2 types of quarks, 1 type of charged lepton, and 1 type of neutrino, totaling 12 types. Propagation particles: including gluons that transmit strong forces, photons that transmit electromagnetic forces, and W and Z bosons that transmit weak forces, there are a total of four types. The Higgs boson: endows other particles with mass through the Higgs field and is the source of matter's weight. Material particles: the cornerstone of the universe. The first generation of quarks was discovered in 1968 (indirectly confirmed by deep inelastic scattering experiments at the Stanford Linear Accelerator Center) with a mass of approximately 2.3 MeV/c ² and a charge of+. The combination of up quarks and down quarks forms protons and neutrons, such as matter.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Subatomic particles constitute the microscopic world of atoms, in which electrons carry negative charges and spin lightly around the nucleus, occupying the vast majority of atomic space; The atomic nucleus contains larger mass protons with positive charges and electrically neutral neutrons, which together form the dense core of the nucleus. The interactions and characteristics of these particles determine the chemical properties and physical behavior of atoms. Due to collisions generated in cosmic ray reactions or particle accelerator experiments, over 200 subatomic particles have been detected, most of which are highly unstable and exist for less than one millionth of a second. The theoretical and experimental research of particle physics, the study of subatomic particles and their properties, has provided scientists with a clearer understanding of the nature of matter and energy, as well as the origin of the universe.