Definitions for quantum chromodynamics
ˌkroʊ moʊ daɪˈnæm ɪksquan·tum chro·mo·dy·nam·ics

Princeton's WordNetRate this definition:0.0 / 0 votes

1. quantum chromodynamics, QCDnoun

   a theory of strong interactions between elementary particles (including the interaction that binds protons and neutrons in the nucleus); it assumes that strongly interacting particles (hadrons) are made of quarks and that gluons bind the quarks together

WiktionaryRate this definition:0.0 / 0 votes

1. quantum chromodynamicsnoun

   A quantum field theory in particle physics which describes the strong interaction of quarks and gluons employing the concept of color charge.

WikipediaRate this definition:0.0 / 0 votes

1. Quantum chromodynamics

   In theoretical physics, quantum chromodynamics (QCD) is the theory of the strong interaction between quarks mediated by gluons. Quarks are fundamental particles that make up composite hadrons such as the proton, neutron and pion. QCD is a type of quantum field theory called a non-abelian gauge theory, with symmetry group SU(3). The QCD analog of electric charge is a property called color. Gluons are the force carriers of the theory, just as photons are for the electromagnetic force in quantum electrodynamics. The theory is an important part of the Standard Model of particle physics. A large body of experimental evidence for QCD has been gathered over the years.

FreebaseRate this definition:0.0 / 0 votes

1. Quantum chromodynamics

   In theoretical physics, quantum chromodynamics is a theory of the strong interaction, a fundamental force describing the interactions between quarks and gluons which make up hadrons. It is the study of the SU Yang–Mills theory of color-charged fermions. QCD is a quantum field theory of a special kind called a non-abelian gauge theory, consisting of a 'color field' mediated by a set of exchange particles. The theory is an important part of the Standard Model of particle physics. A huge body of experimental evidence for QCD has been gathered over the years. QCD enjoys two peculiar properties: ⁕Confinement, which means that the force between quarks does not diminish as they are separated. Because of this, it would take an infinite amount of energy to separate two quarks; they are forever bound into hadrons such as the proton and the neutron. Although analytically unproven, confinement is widely believed to be true because it explains the consistent failure of free quark searches, and it is easy to demonstrate in lattice QCD. ⁕Asymptotic freedom, which means that in very high-energy reactions, quarks and gluons interact very weakly. This prediction of QCD was first discovered in the early 1970s by David Politzer and by Frank Wilczek and David Gross. For this work they were awarded the 2004 Nobel Prize in Physics.

Matched Categories

1. • Quantum Field Theory

How to pronounce quantum chromodynamics?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say quantum chromodynamics in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of quantum chromodynamics in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of quantum chromodynamics in Pythagorean Numerology is: 6