elementary particle symmetry Comparison Table

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elementary particle symmetry comparison table

Subject has definition

SU(2) The symmetry of the weak nuclear interaction.

SU(2) x U(1) The symmetry of the unified electroweak interaction.

SU(3) Symmetrical Unitary of Order 3: A symmetry found in sub-nuclear spectra. It is a concept in group theory, by which Gell-Mann and others, using eight quantum numbers, have been able to combine particles into family groups or supermultiplets, as the lowest-lying eightfold group of the nucleon doublet, the Λ singlet, the Σ triplet, and the Ξ doublet. The SU(3) theory applies only to the strongly interacting particles.

SU(5) Symmetrical Unitary of Order 5: The simplest type of grand unified theory, proposed in the 1970s. (See grand unified theories.)

U(1) The symmetry of the electromagnetic field.

Subject	has definition
SU(2)	The symmetry of the weak nuclear interaction.
SU(2) x U(1)	The symmetry of the unified electroweak interaction.
SU(3)	Symmetrical Unitary of Order 3: A symmetry found in sub-nuclear spectra. It is a concept in group theory, by which Gell-Mann and others, using eight quantum numbers, have been able to combine particles into family groups or supermultiplets, as the lowest-lying eightfold group of the nucleon doublet, the Λ singlet, the Σ triplet, and the Ξ doublet. The SU(3) theory applies only to the strongly interacting particles.
SU(5)	Symmetrical Unitary of Order 5: The simplest type of grand unified theory, proposed in the 1970s. (See grand unified theories.)
U(1)	The symmetry of the electromagnetic field.

Next symmetry: gauge symmetry Up: symmetry, unitary transformation Previous symmetry: CPT invariance