Editing Proton decay (section)

=== Dimension-5 proton decay operators ===
In supersymmetric extensions (such as the [[Minimal Supersymmetric Standard Model|MSSM]]), we can also have dimension-5 operators involving two fermions and two [[sfermion]]s caused by the exchange of a tripletino of mass {{mvar|M}}. The sfermions will then exchange a [[gaugino]] or [[Higgsino]] or [[gravitino]] leaving two fermions. The overall [[Feynman diagram]] has a loop (and other complications due to strong interaction physics). This decay rate is suppressed by <math display="inline"> 1/ M M_\text{SUSY} </math> where {{math|''M''{{sub|SUSY}}}} is the mass scale of the [[superpartner]]s.