Murray Gell-Mann "The Quark"

Murray Gell-Mann talks about how his theoretical schemes led to the developement of the quark model, his inquiry into the fractional charge and his response to the scientific communitites response to the model.
Winner of the 1969 Nobel Prize in Physics for his unique classification of elementary particles into his meson and baryon groups, for which he called his "Eight fold ways", Murray Gell-Mann led to developement of the quark model with the discovery of the Omega Minus baryon, which contained 3 strange quarks in his model. The quark model allowed for the appearance of particles with the same spin in the same quantum state, as long as they have different "color charge" which led to development of Quantum Chromodynamics, using the Dirac Lagrangian for SO(3) fields, represented by the Gell-Mann Matrices, QCD describes nonabelian vector fields which would later describe the color confinement and asymptotic feedom of QCD. This is similar to Feynman's use of the Dirac Lagrangian applied to SO(2) fields represented by the Dirac Matrices which describe abelian scalar fields and contain the electron propogator, mass and interaction terms which are invarient under gauge transformation when a field is introduced that transforms like an electromagnetic field, hence creating the photon propogator. Feynman's diagrams stem from these terms, and these apply for Quantum Chromodynamics as they do for Quantum electrodynamics, except requiring gluons instead of photons.
The inclusion of Gell-Mann's work into the Standard Model would define particle physics up untill the present day, the QCD Lagrangian describes the essential features of quark confinement which result in the Strong Force induced jets of mesons and baryons from quark-antiquark pair production seen in particle accelerators.

Category:

Science & Technology

Tags:

• Murray Gell-Mann
• quark
• gluon
• quantum
• mechanics
• Caltech
• Eight Fold Way
• baryon
• meson
• proton
• neutron
• discussion
• Nobel Prize In Physics
• 1969
• Physics
• Elementary
• Particle
• Particle Physics
• Standard
• Model
• Science
• Quantum Chromodynamics
• QCD
• Quantum Electrodynamics
• QED
• Quantum Field Theory
• QFT