Also unexpected phenomena such as very small shear viscosity to entropy ratio η/s meaning that QGP behaves like ideal liquid and double ridge structure detected first in p-Pb collisions implying long range correlations suggesting emission of particles in opposite directions from a linear string like object. Also the predicted suppression of charmonium production seems to be absent for heavy nuclei.
I have already earlier proposed explanation in terms of a creation of dark pions (and possibly also heavier mesons) of M89 hadron physics with Planck constant heff=512× h. M89 pions would be flux tube like structures having mass 512 times that of ordinary pion but having the same Compton length as ordinary pion and being of the same size as heavy nuclei. The unexpected features of QGP, in particular long range correlations, would reflect quantum criticality. Double ridge structure would reflect the decay of dark mesons to ordinary hadrons. In this article this proposal is discussed in more detail.
For a summary of earlier postings see Latest progress in TGD.