A little inflation in the early universe at the QCD phase transition

Details A little inflation in the early universe at the QCD phase transition A little inflation in the early universe at the QCD phase transition

2009-06-24

arxiv.org/abs/0906.4520v5

Phys.Rev.Lett.105:041301,2010; Erratum-ibid.106:069901,2011

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, discussion about the equation of state added, several minor corrections

Scientific paper

10.1103/PhysRevLett.105.041301 1

We explore a scenario that allows for a strong first order phase-transition of QCD at non-negligible baryon number in the early universe and its possible cosmological observable consequences. The main assumption is a quasi-stable QCD-vacuum state that leads to a short period of inflation, consequently diluting the net baryon to photon ratio to it's today observed value. A strong mechanism for baryogenesis is needed to start out with a baryon asymmetry of order unity, e.g. as provided by Affleck-Dine baryogenesis. The cosmological implications are direct effects on primordial density fluctuations up to dark matter mass scales of 1 - 10 solar masses, change in the spectral slope up to mass scales of 10^6 - 10^8 solar masses, production of primordial magnetic fields with initial strength up to 10^12 Gauss and a gravitational wave spectrum with present day peak strain amplitude of at most h_c = 5 * 10^-15 around a frequency of 4*10^-8 Hz. The little QCD inflation scenario could be probed with the upcoming heavy ion research facility FAIR at GSI, Darmstadt.

Affiliated with

Also associated with

No associations

Rating

A little inflation in the early universe at the QCD phase transition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A little inflation in the early universe at the QCD phase transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A little inflation in the early universe at the QCD phase transition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-106458