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).

Quantum Chromodynamics (QCD) is the theory of strong interactions. It is formulated in terms of elementary fields (quarks and gluons), whose interactions obey the principles of a relativistic QFT, with a non-abelian gauge invariance SU(3).

QCD does not distinguish between quark flavours, onlycolourcharge of quarks matters. At high energy (E ≫binding energy of quarks within hadrons), ratio of σ(pp) total and σ(π+p) total depends on number of possible quark-quark combinations. Predict: Experiment: σ(πp) σ(pp) = 2 ×3 3 ×3 = 2 3 σ(πp) σ(pp) = 24 mb 38 mb ∼ 2 3 Prof ...

2025年1月6日 · In the application of first-principles lattice QCD calculations and QCD physics of hadrons, neutron stars and heavy-ion collisions, we focus on learning physically relevant quantities, such...

2025年1月9日 · Abstract: The integration of deep learning techniques and physics-driven designs is reforming the way we address inverse problems, in which accurate physical properties are extracted from complex data sets. This is particularly relevant for quantum chromodynamics (QCD), the theory of strong interactions, with its inherent limitations in ...

2022年12月21日 · This paper presents a comprehensive review of both the theory and experimental successes of Quantum Chromodynamics, starting with its emergence as a well defined theory in 1972-73 and following developments and results up to the present day.

Hadronic matter - matter susceptible to the strong interaction force - is described by quantum-chromo-dynamics (QCD). The basic constituents of QCD are quarks which interact through the exchange of gluons. It is believed that shortly after the creation of the universe in the Big Bang all matter was in a state called the Quark Gluon Plasma (QGP).

2012年7月10日 · They are intended to give an introduction to the theory and phenomenology of quantum chromodynamics (QCD), focusing on collider physics applications. The aim is to bring the reader to a level where informed decisions can be made concerning different approaches and their uncertainties.

2025年2月27日 · quantum chromodynamics (QCD), in physics, the theory that describes the action of the strong force. QCD was constructed in analogy to quantum electrodynamics (QED), the quantum field theory of the electromagnetic force .

Quantum chromodynamics (QCD) The QCD story begins with pions — the force carriers between nucleons — their prediction and discovery. This is then followed by a "particle zoo" that begs for simplification — quarks and gluons are the answer. The strong force vs. the nuclear force a.k.a. the residual strong force. Quarks are the matter ...