2010/12/22 by Tillmann Boeckel, Simon Schettler, Jürgen Schaffner-Bielich +1 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #astro-ph.CO #nucl-th
paper · pdf · doi:10.1016/j.ppnp.2011.01.017
published as Prog.Part.Nucl.Phys.66:266-270,2011 · 7 pages, invited talk given at the International School of Nuclear Physics, 32nd Course: Particle and Nuclear Astrophysics, Erice, Sicily, September 16-24, 2010, discussion of previous work on QCD inflation included, refs. added
arxiv created 2010/12/22 · openalex publication_date 2011/01/15 · arxiv updated 2011/03/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
The QCD phase diagram might exhibit a first order phase transition for large baryochemical potentials. We explore the cosmological implications of such a QCD phase transition in the early universe. We propose that the large baryon-asymmetry is diluted by a little inflation where the universe is trapped in a false vacuum state of QCD. The little inflation is stopped by bubble nucleation which leads to primordial production of the seeds of extragalactic magnetic fields, primordial black holes and gravitational waves. In addition the power spectrum of cold dark matter can be affected up to mass scales of a billion solar masses. The imprints of the cosmological QCD phase transition on the gravitational wave background can be explored with the future gravitational wave detectors LISA and BBO and with pulsar timing.