Conclusion
Do we see the phase transition hadron → quark-gluon plasma (predicted by so many models) at pp collider energies?
Yes; we even see it alrealy at ISR energies.
This conclusion might only be escaped if all speculations and calculations about this phase transition and the use of statistical thermodynamics in this context are senseless and if the consistency (though not detailed agreement) of their predictions with the experiment is due to some most unlikely accident.
The various distorting mechanisms entering between idealized thermodynamics and real collisions may affect numerical values; they cannot invalidate our conclusion.
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Dedicated to Prof. Bruno Ferretti on the occasion of his seventieth birthday
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Hagedorn, R. Multiplicities,p T distributions and the expected hadron → quark-gluon phase transition. Riv. Nuovo Cim. 6, 1–50 (1983). https://doi.org/10.1007/BF02740917
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DOI: https://doi.org/10.1007/BF02740917