In theoretical physics,

**quantum chromodynamics** (QCD) is a theory of the strong interaction

? (

color force), a fundamental force describing the interactions of the

quarks and

gluons making up

hadrons (such as the

proton,

neutron or pion

?). It is the study of the SU(3) Yangâ€“Mills theory of color-charged fermions (the

quarks).

**QCD** is a quantum field theory of a special kind called a non-abelian gauge theory

?. It 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.

There is no known phase-transition line separating these two properties; confinement is

dominant in low-energy scales but, as energy increases, asymptotic freedom becomes

dominant. (wikipedia)

See Also

**3.22 - Quantum Leap Delta equivalent to Locked Potentials Delta**
**4.10 - Component Dynamics of Quantum Construction**
**7B.08 - The Etheric Quantum Soup**
**15.13 - Dissociating Water Acoustically - Liberation of Quantum Constituents**
**Etheric Elements**
**Figure 3.37 - Successive Centralizations or Quantum Leap**
**quantum**
**Quantum Arithmetic**
**Quantum Entanglement**
**Quantum Leap**
**quantum mechanics**
**quantum state**
**quantum theory**
**Table of Quantum Particles**