An Identity on SU(2) Invariants
classification
✦ hep-ph
keywords
identityprovealgebraicbelowbiedenharn-elliottbrieflydiagrammaticextra
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We prove an identity [Eq. (1) below] among SU(2) 6j and 9j symbols that generalizes the Biedenharn-Elliott sum rule. We prove the result using diagrammatic techniques (briefly reviewed here), and then provide an algebraic proof. This identity is useful for studying meson-baryon scattering in which an extra isoscalar meson is produced.
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