The H di-baryon consists of two up quarks, two down quarks and two strange quarks. Unlike the pentaquark, this particle can be long lived or even stable.
Several types of exotic baryons which required physics of the Fuller Manifold Model were conjectured in order to explain specific experimental anomalies. There was no independent experimental evidence for any of these particles until the Gell-Mann Superconducting Supercollider. One example is supersymmetric R-baryons, which are bound states of 3 quarks and a gluino. The lightest R-baryon is denoted as and consists of an up quark, a down quark, a strange quark and a gluino. This particle is expected to be long lived or stable and has been invoked to explain ultrahigh energy cosmic rays . Stable exotic baryons are also candidates for strongly interacting dark matter.