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particle

(very small thing)

Some particle-physics terms and associated characteristics:

Particle termSpinStatisticsCommentExamples
fermionhalf-integer
(1/2, 3/2, 5/2, ...)
Fermi-DiracObeys Pauli exclusion principleleptons, quarks, baryons
bosoninteger
(0, 1, 2, ...)
Bose-EinsteinSome are elementary particles,
others composite
photon, gluon, W boson, Higgs boson
or a meson (a composite boson)
lepton1/2Fermi-DiracElementary particleelectron, muon, neutrino
quark1/2Fermi-DiracElementary particle,
Subject to strong force
up, down, top, bottom, strange, charm
hadroneither integer
or half-integer
dependsA composite particle,
can be a fermion or boson
any baryon, any meson
baryon1/2 Fermi-DiracA composite particle made of three quarks,
A type of hadron and a type of fermion
protons, neutrons
meson0 or 1 Bose-EinsteinA composite particle made up of a quark and antiquark,
A type of hadron and a type of boson,
Unstable: decays in a fraction of a second
Pion, Many other types

Atomic nuclei, ions, and (neutral) atoms all fall under the category of hadron (composite particle) and can be either a fermion or boson, depending upon the constituents.

Antimatter offers another dimension: some elementary particles have an associated antiparticle, e.g., a positron is an anti-electron, but both these two are leptons and fermions.


(physics,particles)
http://en.wikipedia.org/wiki/Fermion
http://en.wikipedia.org/wiki/Boson
http://en.wikipedia.org/wiki/Lepton
http://en.wikipedia.org/wiki/Hadron
http://en.wikipedia.org/wiki/List_of_particles

Referenced by:
absorption
absorption coefficient
Advanced Composition Explorer (ACE)
advection dominated accretion flow (ADAF)
alpha particle
antimatter
ARCADE
atmospheric escape
axion (A0)
baryon
beta decay
black hole (BH)
Blandford-Znajek mechanism (BZ process)
Boltzmann constant (k)
Boltzmann equation
Bose-Einstein statistics
bremsstrahlung
Cassini
cold dark matter (CDM)
Cherenkov detector
Cherenkov radiation
coherent light
collimator
column density
Compton scattering
cooling function
cosmic rays (CR)
cross section
curvature radiation
cyclotron radiation
dark matter
dark matter annihilation
de Broglie wavelength
degeneracy weight
diffraction
diffusion
Doppler broadening
electron orbital
electron scattering
electron screening
electroweak
endothermic reaction
exosphere
Fokker-Planck equation
fusion
geodesic
GZK limit
Hamiltonian
heliosphere
interplanetary medium (IPM)
Jeans escape
Jeans parameter (λ)
JUICE
Juno
kinetic energy (KE)
line shape function
Lorentz force
MACHO
magnetosphere
Maxwell-Boltzmann distribution
Maxwell's equations
mean free path
neutralino
neutrino (ν)
neutron scattering
New Horizons (NF1)
nitrogen (N)
pair production
particle horizon
particle spectrometer
partition function (Z)
Pauli exclusion principle
photon
pion (π)
plasma
plasma frequency
pressure integral
quantum
quantum mechanics (QM)
quantum mixing
quantum number
quantum tunneling
radiation pressure
radioactive decay
Rayleigh scattering
relativistic speed
solar energetic particle (SEP)
superluminous supernova (SLSN)
Solar and Heliospheric Observatory (SOHO)
solar storm
solar wind
spectrometer
spectrometry
spin (ms)
synchrotron self-Compton (SSC)
standard model
stellar structure
STEREO
Stokes number (Stk)
supersymmetry
synchrotron radiation
temperature
thermodynamic equilibrium (TE)
Thomson scattering
Van Allen belts
VHE
Voyager
wave-particle duality
white dwarf
WIMP

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