The first second of leptons

摘要: We study the influence of lepton asymmetries on evolution early Universe. The asymmetry l is poorly constrained by observations and might be orders magnitudes larger than observed baryon b~O(10^{-10}), |l|/b~O(10^9). We find that large compared to tiny asymmetry, can dynamics QCD phase transition significantly. cosmic trajectory in mu_{B}-T diagram strongly interacting matter becomes a function (flavour) asymmetry. For or vanishing lattice simulations show rapid crossover. However, for order remains unknown. We one more flavour changes number helicity degrees freedom all particles equilibrium g_{ast} relic abundance WIMPs, depending at freeze out temperature 40 GeV > T_fo 0.4 we decreasing few percent l_f . an = 0.1 three decrease WIMP given almost 20 percent.