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Description

In this interview, Murray Gell-Mann talks about his experience of working along with Richard Feynman in Caltech. A good insight into the two clashing personalities of the two great men, both equal in intelligence, but very different in mannerisms and image.
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 development of the quark model using his concept of "strangeness" and isospin in the the Gell-Mann--Nishijima formula which was proven correct with the discovery of the Omega Minus baryon, which contained 3 strange quarks in his model.
https://www.youtube.com/watch?v=KDkaMuN0DA0
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 SU(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 SU(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.
Richard Feynman shared the 1965 Nobel prize in Physics for his work on QED with Julian Schwinger and Sin-Itiro Tomonaga, which triggered the modern view of particle physics: The Standard Model of Particle Physics.
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.

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