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In theoretical physics, quantum chromodynamics (QCD) is the study 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).
Lattice QCD is a well-established non-perturbative approach to solving the quantum chromodynamics (QCD) theory of quarks and gluons. It is a lattice gauge theory formulated on a grid or lattice of points in space and time.
The QCD (Quantum Chromodynamics) of the hadronization process are not yet fully understood, but are modeled and parameterized in a number of phenomenological studies, including the Lund string model and in various long-range QCD approximation schemes. [5] [11] [12] The tight cone of particles created by the hadronization of a single quark is ...
Lattice QCD – Quantum chromodynamics on a lattice; Quantum chromodynamics – Theory of the strong nuclear interactions; Quark–gluon plasma – Phase of quantum chromodynamics (QCD) Quark star – Compact exotic star which forms matter consisting mostly of quarks; SU(2) color superconductivity – Property of quark matter
The QCD vacuum is the quantum vacuum state of quantum chromodynamics (QCD). It is an example of a non-perturbative vacuum state, characterized by non-vanishing condensates such as the gluon condensate and the quark condensate in the complete theory which includes quarks.
The key difference between quantum electrodynamics and quantum chromodynamics is that the gluon field strength has extra terms which lead to self-interactions between the gluons and asymptotic freedom. This is a complication of the strong force making it inherently non-linear, contrary to the linear theory of the electromagnetic force.
In strong interaction physics, light front holography or light front holographic QCD is an approximate version of the theory of quantum chromodynamics (QCD) which results from mapping the gauge theory of QCD to a higher-dimensional anti-de Sitter space (AdS) inspired by the AdS/CFT correspondence [1] (gauge/gravity duality) proposed for string ...
The observations leading to the discovery of this part of the Standard Model are discussed in the article in quantum chromodynamics. The notation W μ ν a {\displaystyle W_{\mu \nu }^{a}} will be used for the gauge field tensor of SU(2) where a runs over the 3 generators of this group.