The QCD phase transition in the inhomogeneous Universe

Details The QCD phase transition in the inhomogeneous Universe The QCD phase transition in the inhomogeneous Universe

2000-04-27

arxiv.org/abs/hep-ph/0004259v2

Phys.Rev.Lett. 86 (2001) 2216-2219

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version to appear in Phys. Rev. Lett., 4 pages, 1 figure. Difference to heterogeneous nucleation emphasized, amplitude of temp

Scientific paper

10.1103/PhysRevLett.86.2216

We investigate a new mechanism for the cosmological QCD phase transition: inhomogeneous nucleation. The primordial temperature fluctuations, measured to be $\delta T/T \sim 10^{-5}$, are larger than the tiny temperature interval, in which bubbles would form in the standard picture of homogeneous nucleation. Thus the bubbles nucleate at cold spots. We find the typical distance between bubble centers to be a few meters. This exceeds the estimates from homogeneous nucleation by two orders of magnitude. The resulting baryon inhomogeneities may affect primordial nucleosynthesis.

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