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・ R. Black (Leicestershire cricketer)
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R-symmetry
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・ R-type asteroid
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R-symmetry : ウィキペディア英語版
R-symmetry

In theoretical physics, the R-symmetry is the symmetry transforming different supercharges in a theory with supersymmetry into each other. In the simplest case of the N=1 supersymmetry, such an R-symmetry is isomorphic to a global U(1) group or its discrete subgroup (for the Z2 subgroup it is called R-parity). For extended supersymmetry, the R-symmetry group becomes a global non-abelian group.
In a model that is classically invariant under both N=1 supersymmetry and conformal transformations, the closure of the superconformal algebra (at least on-shell) needs the introduction of a further bosonic generator that is associated to the R-symmetry.
==References==

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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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