What is the link between the energies of particles and the corresponding temperature, in context of quark gluon plasma?

Question

What is the link between the energies of particles and the corresponding temperature, in context of quark gluon plasma ?

Is quark gluon plasma existing at low or high energy of particles ? Or is it defined only for the temperature ?

I'm not quite sure what you're asking here. Temperature is, roughly speaking, a measure of the (thermal) kinetic energy of the particles. Quark-gluon plasma is very hot; see https://en.wikipedia.org/wiki/Hagedorn_temperature — PM 2Ring, Apr 25 '20 at 16:26
@PM 2Ring : I'm not an expert at all on QGP. Let's consider many particle that all have an energy E : what is temperature ? Is T=E ? Or is there no relationship between the two ? (this is my question) — Mathieu Krisztian, Apr 25 '20 at 16:45

score 2 · Accepted Answer · edited Jun 29 '20 at 23:42

Quark-gluon plasma is a new state of matter - requiring either high baryon density, or high $T$ - there is a phase boundary to confined hadron phase. QGP arises as deconfined state above Hagedorn temperature $T_h=150\ MeV$ at zero baryon density. At $T>2T_h$ it is behaving like an ideal relativistic gas with some $10$% correction due to interactions. QGP is now made from up, down, strange quarks and gluons. These particles are practically relativistic meaning mass is small compared to kinetic energy. In a thermal relativistic gas a particle has on average the energy $E=3T$ with small variations for Bose/Fermi quantum effects. therefore the energy per quark, gluon in QGP is always above $0.5\ GeV$ and growing with temperature.

What is the link between the energies of particles and the corresponding temperature, in context of quark gluon plasma?

1 Answers1