Physics:Quantum elementary particle: Difference between revisions
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{{Short description|Particle with no known internal substructure}} | |||
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== Historical names == | |||
* [[Biography:J. J. Thomson|J. J. Thomson]] discovered the electron, the first identified elementary particle. | |||
* [[Biography:Paul Dirac|Paul Dirac]] predicted antimatter through relativistic quantum theory. | |||
* [[Biography:Murray Gell-Mann|Murray Gell-Mann]] and [[Biography:George Zweig|George Zweig]] introduced the quark model for hadrons. | |||
=References= | =References= | ||
Latest revision as of 08:03, 23 May 2026
elementary particle is a Book II topic in the Quantum Collection. A quantum elementary particle is a particle with no known smaller constituents. In the Standard Model, elementary particles include quarks, leptons, gauge bosons, and the Higgs boson. Their behavior is specified by quantum fields, spin, mass, charges, and interaction symmetries rather than by internal mechanical parts. A quantum elementary particle is a particle with no known smaller constituents. In the Standard Model, elementary particles include quarks, leptons, gauge bosons, and the Higgs boson. Their behavior is specified by quantum fields, spin, mass, charges, and interaction symmetries rather than by internal mechanical parts. Elementary matter particles are fermions: six quark flavors and six lepton states when neutrinos are counted by flavor.
Standard Model classification
Elementary matter particles are fermions: six quark flavors and six lepton states when neutrinos are counted by flavor. Interaction carriers include the photon, gluon, W and Z bosons, and the Higgs boson as a scalar field excitation. Antiparticles and internal degrees of freedom such as color charge enlarge the set of physical states observed in reactions.[1][2]
No observed substructure
The phrase elementary does not mean that substructure is logically impossible. It means that no compositeness has been detected at available experimental energies and length scales. Precision scattering, collider searches, magnetic moments, and rare decays test whether a particle behaves as pointlike or has hidden structure.
Quantum numbers
Elementary particles are distinguished by mass, spin, electric charge, color representation, weak isospin, hypercharge, flavor, and parity-related behavior. These quantum numbers determine which interactions are allowed and how particles may decay or scatter.
Description
elementary particle is a matter-scale concept used to organize how quantum theory describes atoms, particles, fields, condensed matter, plasma, or spacetime-related systems. In the Quantum Collection it is placed by scale so the reader can move from materials and molecules down to subatomic degrees of freedom.
Quantum context
At this scale, the relevant behavior is controlled by quantized states, interactions, conservation laws, and the way excitations or particles are observed. The concept is normally linked to measurable properties such as energy, momentum, charge, spin, spectra, scattering rates, or collective modes.
Role in the collection
This page provides a compact reference point for related pages in Book II. It should be read together with nearby matter-scale topics and the corresponding foundations in quantum mechanics.[3]
See also
Table of contents (84 articles)
Index
Full contents
Historical names
- J. J. Thomson discovered the electron, the first identified elementary particle.
- Paul Dirac predicted antimatter through relativistic quantum theory.
- Murray Gell-Mann and George Zweig introduced the quark model for hadrons.
References
- ↑ Halzen, Francis; Martin, Alan D. (1984). Quarks and Leptons: An Introductory Course in Modern Particle Physics. Wiley. ISBN 978-0-471-88741-6.
- ↑ Schwartz, Matthew D. (2014). Quantum Field Theory and the Standard Model. Cambridge University Press. ISBN 978-1-107-03473-0.
- ↑ "Quantum mechanics". https://en.wikipedia.org/wiki/Quantum_mechanics.
Source attribution: Physics:Quantum elementary particle