Order in the mass spectrum of elementary particles
  The study on the linkage of elementary particle mass differences with pion-muon mass difference is explored further. In the present study we show this linkage to be equally true for the mass differences amongst the members of SU(3) hadron multiplets and the hadrons belonging to multiplets having different spin and parity characteristics. This reinforces our contention that inter particle mass excitations are quantized as integral multiples of basic mass unit of 29.318 MeV and thereby indicates the fundamental nature of pion-muon mass difference in the elementary particle mass distribution. 
T. A. Mir and G. N. Shah