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Elementary particle. In particle physics, an elementary particle or fundamental particle is a subatomic particle that is not composed of other particles. [1] The Standard Model presently recognizes seventeen distinct particles—twelve fermions and five bosons.
Elementary particles are classified according to their spin. Fermions have half-integer spin while bosons have integer spin. All the particles of the Standard Model have been experimentally observed, including the Higgs boson in 2012. [2] [3] Many other hypothetical elementary particles, such as the graviton, have been proposed, but not ...
Mathematical consistency of the Standard Model requires that any mechanism capable of generating the masses of elementary particles must become visible [clarification needed] at energies above 1.4 TeV; [45] therefore, the LHC (designed to collide two 7 TeV proton beams) was built to answer the question of whether the Higgs boson actually exists ...
Standard Model of Particle Physics. The diagram shows the elementary particles of the Standard Model (the Higgs boson, the three generations of quarks and leptons, and the gauge bosons), including their names, masses, spins, charges, chiralities, and interactions with the strong, weak and electromagnetic forces.
Parity. +1 [7][8] The Higgs boson, sometimes called the Higgs particle, [9][10] is an elementary particle in the Standard Model of particle physics produced by the quantum excitation of the Higgs field, [11][12] one of the fields in particle physics theory. [12] In the Standard Model, the Higgs particle is a massive scalar boson with zero spin ...
The elementary charge, usually denoted by e, is a fundamental physical constant, defined as the electric charge carried by a single proton or, equivalently, the magnitude of the negative electric charge carried by a single electron, which has charge −1 e. [2][a] In the SI system of units, the value of the elementary charge is exactly defined ...
Particle physics. Particle physics or high-energy physics is the study of fundamental particles and forces that constitute matter and radiation. The field also studies combinations of elementary particles up to the scale of protons and neutrons, while the study of combination of protons and neutrons is called nuclear physics.
An overview of the various families of elementary and composite particles, and the theories describing their interactions. Fermions are on the left, and Bosons are on the right. In the conceptual model of fundamental interactions, matter consists of fermions , which carry properties called charges and spin ± 1 ⁄ 2 (intrinsic angular momentum ...