hypothetical particle Comparison Table

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hypothetical particle comparison table

Subject is not accelerated by is part of is a kind of has quantum behavior has acronym carries the force has spin has synonym has mass has definition has charge see also

axion boson Bose-Einstein statistics 0 10^-5 to 10^-3 eV A hypothetical spin-0 particle with a very small mass of 10^-5-10^-3 eV. It was postulated in order to provide a natural solution to the "strong CP problem".

dark matter dark halo hypothetical particle hidden mass Matter whose presence is inferred from dynamical measurements but which has no optical counterpart. The luminous regions of galaxies have mass-luminosity ratios of about 10. However, the mass-luminosity ratio in the outer halos of many spiral galaxies is 100 or more; one sees the brightness fall off with distance from the center of the galaxy but considerable mass is present. A similar situation prevails in galaxy clusters, where nonluminous matter must provide most of the self-gravitational attraction that holds the clusters together. The missing mass is not really missing; it is present but invisible (at least to current detectors). It is generally believed to consist either of the remnants of massive stars or of planetary-sized objects comparable in mass to Jupiter.

glueball hypothetical particle Theoretical particles made exclusively of gluons. Tentative evidence of the existence of glueballs had been found in accelerator experiments by the mid-1980s.

Goldstone boson boson Bose-Einstein statistics 0 A massless spin-0 particle which arises whenever a (continuous) global symmetry is spontaneously broken.

gravitino hypothetical particle Hypothetical force-carrying particles predicted by supersymmetry theories. The gravitino's spin would be 1/2. Its mass is unknown.

graviton electric or magnetic fields hypothetical particle Bose-Einstein statistics gravity 2 force carrier 0 The quanta thought to convey gravitational force; analogous to the photons, gluons, and intermediate vector bosons of electromagnetism and the strong and weak nuclear forces. Predicted by quantum theory of gravity, gravitons have not yet been detected. 0

Higgs boson boson Bose-Einstein statistics integral A hypothetical, spinless particle that plays an important role in the Glashow-Weinberg-Salam electroweak theory (and in other theories involving spontaneous symmetry breaking, e.g. GUTs).

magnetic monopole hypothetical particle has definition A hypothetical quantum object being a single, isolated magnetic pole. Normally, magnetic poles, the sources of a magnetic field, occur in pairs as north and south poles.

parton elementary particle A hypothetical pointlike constituent of a nucleon, which contains all the charge of the nucleon.

shadow matter hypothetical particle Theoretical classes of particles, their existence intimated by supersymmetry, theory, that participate in few if any of the four known fundamental forces. Planets, stars, and galaxies made of shadow matter could conceivably exist in the same space and time we occupy without our sensing their presence.

sparticle hypothetical particle Hypothetical particle which is predicted by some Grand Unified Theories.

superpartner hypothetical particle Particle whose spins differ by 1/2 unit and that are paired by supersymmetry.

tachyon hypothetical particle Particle whose mass (squared) is negative; its presence in a theory generally yields inconsistencies.

vector boson hypothetical particle Bose-Einstein statistics IVB electroweak force carrier A hypothetical elementary particle that acts as intermediary for the weak interaction, carrying its effect from one particle to another as the photon does for electromagnetic interactions and as various mesons do for the strong interactions. Weinberg-Salam theory

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Subject	is not accelerated by	is part of	is a kind of	has quantum behavior	has acronym	carries the force	has spin	has synonym	has mass	has definition	has charge	see also
axion			boson	Bose-Einstein statistics			0		10^-5 to 10^-3 eV	A hypothetical spin-0 particle with a very small mass of 10^-5-10^-3 eV. It was postulated in order to provide a natural solution to the "strong CP problem".
dark matter		dark halo	hypothetical particle					hidden mass		Matter whose presence is inferred from dynamical measurements but which has no optical counterpart. The luminous regions of galaxies have mass-luminosity ratios of about 10. However, the mass-luminosity ratio in the outer halos of many spiral galaxies is 100 or more; one sees the brightness fall off with distance from the center of the galaxy but considerable mass is present. A similar situation prevails in galaxy clusters, where nonluminous matter must provide most of the self-gravitational attraction that holds the clusters together. The missing mass is not really missing; it is present but invisible (at least to current detectors). It is generally believed to consist either of the remnants of massive stars or of planetary-sized objects comparable in mass to Jupiter.
glueball			hypothetical particle							Theoretical particles made exclusively of gluons. Tentative evidence of the existence of glueballs had been found in accelerator experiments by the mid-1980s.
Goldstone boson			boson	Bose-Einstein statistics			0			A massless spin-0 particle which arises whenever a (continuous) global symmetry is spontaneously broken.
gravitino			hypothetical particle							Hypothetical force-carrying particles predicted by supersymmetry theories. The gravitino's spin would be 1/2. Its mass is unknown.
graviton	electric or magnetic fields		hypothetical particle	Bose-Einstein statistics		gravity	2	force carrier	0	The quanta thought to convey gravitational force; analogous to the photons, gluons, and intermediate vector bosons of electromagnetism and the strong and weak nuclear forces. Predicted by quantum theory of gravity, gravitons have not yet been detected.	0
Higgs boson			boson	Bose-Einstein statistics			integral			A hypothetical, spinless particle that plays an important role in the Glashow-Weinberg-Salam electroweak theory (and in other theories involving spontaneous symmetry breaking, e.g. GUTs).
magnetic monopole			hypothetical particle							has definition A hypothetical quantum object being a single, isolated magnetic pole. Normally, magnetic poles, the sources of a magnetic field, occur in pairs as north and south poles.
parton			elementary particle							A hypothetical pointlike constituent of a nucleon, which contains all the charge of the nucleon.
shadow matter			hypothetical particle							Theoretical classes of particles, their existence intimated by supersymmetry, theory, that participate in few if any of the four known fundamental forces. Planets, stars, and galaxies made of shadow matter could conceivably exist in the same space and time we occupy without our sensing their presence.
sparticle			hypothetical particle							Hypothetical particle which is predicted by some Grand Unified Theories.
superpartner			hypothetical particle							Particle whose spins differ by 1/2 unit and that are paired by supersymmetry.
tachyon			hypothetical particle							Particle whose mass (squared) is negative; its presence in a theory generally yields inconsistencies.
vector boson			hypothetical particle	Bose-Einstein statistics	IVB	electroweak		force carrier		A hypothetical elementary particle that acts as intermediary for the weak interaction, carrying its effect from one particle to another as the photon does for electromagnetic interactions and as various mesons do for the strong interactions.		Weinberg-Salam theory