Pi-meson as the quanta of non-newtonian hadronic fluid
  It occurs that when we attempt to melt the nucleon in order to obtain the free quark gas, or QGP fluid the mass of the heat quantum (heaton) is equal to the pi-meson mass.   Key words: Heat quanta; Quantum heat transport; Quantum diffusion coefficient. 
M. Kozlowski, J. Marciak-Kozlowska