A pedagogical review introducing functional QCD methods for studying the phase diagram of strong interaction matter at finite temperature and density.
Lepton asymmetry and the cosmic QCD transition
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abstract
We study the influence of lepton asymmetry on the evolution of the early Universe. The lepton asymmetry $l$ is poorly constrained by observations and might be orders of magnitude larger than the baryon asymmetry $b$, $|l|/b \leq 2\times 10^8$. We find that lepton asymmetries that are large compared to the tiny baryon asymmetry, can influence the dynamics of the QCD phase transition significantly. The cosmic trajectory in the $\mu_B-T$ phase diagram of strongly interacting matter becomes a function of lepton (flavour) asymmetry. Large lepton asymmetry could lead to a cosmic QCD phase transition of first order.
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Phase structure of strong interaction matter from Functional QCD
A pedagogical review introducing functional QCD methods for studying the phase diagram of strong interaction matter at finite temperature and density.