R-parity Violating Couplings of The MSSM
The renormalizable R-parity violating couplings of the MSSM are
- violates B by 1 unit
The strongest constraint involving this coupling alone is from to neutron - antineutron oscillations.
- violates L by 1 unit
The strongest constraint involving this coupling alone is the violation universality of Fermi constant in quark and leptonic charged current decays.
- violates L by 1 unit
The strongest constraint involving this coupling alone is the violation universality of Fermi constant in leptonic charged current decays.
- violates L by 1 unit
The strongest constraint involving this coupling alone is that it leads to a large neutrino mass.
While the constraints on single couplings are reasonably strong, if multiple couplings are combined together, they lead to proton decay. Thus there are further maximal bounds on values of the couplings from maximal bounds on proton decay rate.
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