Detecting quark matter in the early universe by gravitational waves

Details Detecting quark matter in the early universe by gravitational waves Detecting quark matter in the early universe by gravitational waves

2011-05-02

arxiv.org/abs/1105.0339v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, talk given at the symposium "Advances in Nuclear Physics in Our Time", Goa, India, Nov. 28 - Dec. 2, 2010

Scientific paper

For large baryochemical potential, strongly interacting matter might undergo a first order phase transition at temperatures T ~ 100-200 MeV. Within standard cosmology, however, the chemical potential is assumed to be very small leading to a crossover. We discuss implications of a first order QCD transition at high chemical potential being consistent with current observations. In this contribution we concentrate on effects on the gravitational wave spectrum. There are other interesting cosmological signals as a modification of the power spectrum of dark matter, the production of stellar black holes, and the seeds for the extragalactic magnetic fields which we briefly address also.

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