Definition of quantum chromodynamics in English:

quantum chromodynamics

Line breaks: quan|tum chromo|dynam¦ics
Pronunciation: /krəʊməʊdʌɪˈnamɪks
(abbreviation: QCD)


[treated as singular] Physics
  • A quantum field theory in which the strong interaction is described in terms of an interaction between quarks mediated by gluons, both quarks and gluons being assigned a quantum number called ‘colour’.
    More example sentences
    • Everyone agrees that the fundamental theory of the strong interaction is a quantum field theory known as quantum chromodynamics, or QCD for short.
    • Today the other three forces are described by the gauge theories of quantum chromodynamics and quantum electrodynamics, which together make up the Standard Model of particle physics.
    • The theory of the strong interaction between quarks - quantum chromodynamics - is approximately invariant under what is called charge symmetry.

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