gluon
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Key facts
- Particle.discovered
- e+e− → Υ(9.46) → 3g: 1978 at DORIS (DESY) by PLUTO experiments (see diagram 2 and recollection) and e+e− → qg: 1979 at PETRA (DESY) by TASSO, MARK-J, JADE and PLUTO experiments (see diagram 1 and review)
- Particle.symbol
- g
- Particle.electric_charge
- 0 e
- Particle.color_charge
- octet (8 linearly independent types)
- Particle.spin
- 1 ħ
- Particle.parity
- −1
- Particle.name
- Gluon
- Particle.image
- 200px|class=skin-invert-image
- Particle.caption
- Diagram 1: In Feynman diagrams, emitted gluons are represented as helices. This diagram depicts the annihilation of an electron and positron.
- Particle.num_types
- 8
- Particle.composition
- Elementary particle
- Particle.statistics
- Bose–Einstein statistics
via Wikipedia infobox
Article
12 sectionsContents
- Properties
- Counting gluons
- Color singlet states <span class="anchor" id="Color singlet"></span>
- Eight color states
- Group theory details
- Confinement
- Experimental observations
- See also
- Footnotes
- References
- Further reading
- External resources
A gluon ( ) is a type of massless elementary particle that mediates the strong interaction between quarks, acting as the exchange particle for the interaction. Gluons are massless vector bosons, thereby having a spin of 1. Through the strong interaction, gluons bind quarks into groups according to quantum chromodynamics (QCD), forming hadrons such as protons and neutrons.
Gluons carry the color charge of the strong interaction, thereby participating in the strong interaction as well as mediating it. Because gluons carry the color charge, QCD is more difficult to analyze compared to quantum electrodynamics (QED) where the photon carries no electric charge.