In the Skyrmion model, plotting a pion field in coordinates representing this quantity yields the hedgehog solution.  
In the Skyrmion model, plotting a pion field in coordinates representing this quantity yields the hedgehog solution.  A hypothetical carrier of the 'weak' type of this quantity  mixes with a B boson to produce the Z boson and a photon. The symmetry of this value is broken in SU three due to the high mass of the strange quark. The projection of this value along an axis is related to the charge and hypercharge in the Gell-Mann-Nishijima formula. Like a similarly named concept, Clebsch-Gordan coefficients can be utilized to add multiple values of this together because of its symmetry under SU two. FTP, identify this quantum number that was originally developed by Heisenberg to explain the different charges of the nearly equally massive proton and neutron, symbolized I.
In the Skyrmion model, plotting a pion field in coordinates representing this quantity yields the hedgehog solution.  
isospin [accept isobaric spin, accept isotopic spin, do not accept or prompt on "spin"]