Lepton asymmetry and the cosmic QCD transition

Schwarz D, Stuke M (2009)
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS 2009(11): 025.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
We study the influence of lepton asymmetries on the evolution of the early Universe. The lepton asymmetry l is poorly constrained by observations and might be orders of magnitudes larger than the observed baryon asymmetry b similar or equal to 10(-10), vertical bar l vertical bar/b <= 2 x 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. For tiny or vanishing baryon and lepton asymmetries lattice QCD simulations show that the cosmic QCD transition is a rapid crossover. However, for large lepton asymmetry, the order of the cosmic transition remains unknown.
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Zeitschriftentitel
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Band
2009
Ausgabe
11
Art.-Nr.
025
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Schwarz D, Stuke M. Lepton asymmetry and the cosmic QCD transition. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. 2009;2009(11): 025.
Schwarz, D., & Stuke, M. (2009). Lepton asymmetry and the cosmic QCD transition. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2009(11), 025. doi:10.1088/1475-7516/2009/11/025
Schwarz, D., and Stuke, M. (2009). Lepton asymmetry and the cosmic QCD transition. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS 2009:025.
Schwarz, D., & Stuke, M., 2009. Lepton asymmetry and the cosmic QCD transition. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2009(11): 025.
D. Schwarz and M. Stuke, “Lepton asymmetry and the cosmic QCD transition”, JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, vol. 2009, 2009, : 025.
Schwarz, D., Stuke, M.: Lepton asymmetry and the cosmic QCD transition. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS. 2009, : 025 (2009).
Schwarz, Dominik, and Stuke, Maik. “Lepton asymmetry and the cosmic QCD transition”. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS 2009.11 (2009): 025.

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arXiv: 0906.3434

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