R-parity
Sign in to saveR-parity is a concept in particle physics. In the Minimal Supersymmetric Standard Model, baryon number and lepton number are no longer conserved by all of the renormalizable couplings in the theory. Since baryon number and lepton number conservation have been tested very precisely, these couplings need to be very small in order not to be in conflict with experimental data. R-parity is a \mathbb{Z}_2 symmetry acting on the Minimal Supersymmetric Standard Model (MSSM) fields that forbids these couplings and can be defined as P_\mathrm{R} = (-1)^{3B+L+2s}
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Encyclopedic overview
7 sectionsContents
- Dark matter candidate
- R-parity violating couplings of the MSSM
- Proton decay
- Possible origins of R-parity
- See also
- References
- External links
R-parity is a concept in particle physics. In the Minimal Supersymmetric Standard Model, baryon number and lepton number are no longer conserved by all of the renormalizable couplings in the theory. Since baryon number and lepton number conservation have been tested very precisely, these couplings need to be very small in order not to be in conflict with experimental data. R-parity is a \mathbb{Z}_2 symmetry acting on the Minimal Supersymmetric Standard Model (MSSM) fields that forbids these couplings and can be defined as P_\mathrm{R} = (-1)^{3B+L+2s}
or, equivalently, as P_\mathrm{R} = (-1)^{3(B-L)+2s}
Excerpted from Wikipedia’s “R-parity” article, available under the CC BY-SA 4.0 licence.