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77 Physics of Elementary Particles and Fields

Includes quantum mechanics; theoretical physics; and statistical mechanics. For related information see also 72 Atomic and Molecular Physics; 73 Nuclear Physics; and 25 Inorganic, Organic and Physical Chemistry.


Elementary Particle Physics – Branch of physics concerned with the nature and properties of subatomic particles especially through the study of high-energy collisions and decays.

Statistical Mechanics – Branch of physics concerned with predictions of the behavior of macroscopic systems based on the interactions of the microscopic constituents of the system, where the number of constituents is very large. NASA Thesaurus, Washington, DC: National Aeronautics and Space Administration.

NASA Interest

Exhaustive Interest : SELINT: Aspects of elementary particles, field theory, and statistical physics for those applications that may be of use to the aerospace program.


Input Subjects of Specific Interest

  • annihilation reactions
  • antimatter
  • antiparticles
  • baryons
  • Boltzmann statistics
  • Bose and Fermi statistics
  • bosons
  • elementary particle interactions
  • elementary particles
  • fermions
  • Feynman diagrams
  • gauge field theory
  • high energy physics
  • kaons
  • leptons
  • mesons
  • momentum transfer (particle interactions)
  • neutrinos
  • neutron properties
  • neutron sources
  • neutron spectra
  • particle physics
  • pions
  • quantum chromodynamics (QCD)
  • quantum electrodynamics (QED)
  • quantum mechanics
  • quarks
  • standard model (particle physics)
  • statistical physics
  • string theory
  • strong interactions (field theory)
  • supergravity
  • superstring theory
  • supersymmetry
  • symmetry breaking
  • theoretical physics
  • theory of relativity
  • unified field theory
  • weak interactions (field theory)