R-parity is a concept in particle physics. In the extension of the Standard Model to include supersymmetry, baryon and lepton numbers of particles are no longer assumed to be conserved. Instead R-parity may be conserved, where the R-parity is
- R = (-1)2j+3B+L.
With spin j, baryons B, and leptons L.
All Standard Model particles have R-parity of 1 while supersymmetric particles have R-parity -1.
R-parity violations may point towards new physics.
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