A little inflation in the early universe at the QCD phase transition
We explore a scenario that allows for a strong first order phase transition of QCD at a non-negligible baryon number in the early Universe and its possible observable consequences. The main assumption is a quasistable QCD-vacuum state that leads to a short period of inflation, consequently diluting...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
19 July 2010
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| In: |
Physical review letters
Year: 2010, Volume: 105, Issue: 4, Pages: 1-4 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.105.041301 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.105.041301 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.105.041301 
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| Author Notes: | Tillmann Boeckel and Jürgen Schaffner-Bielich |
| Summary: | We explore a scenario that allows for a strong first order phase transition of QCD at a non-negligible baryon number in the early Universe and its possible observable consequences. The main assumption is a quasistable QCD-vacuum state that leads to a short period of inflation, consequently diluting the net baryon to photon ratio to today’s 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 Mmax ∼1-10M⊙, change in the spectral slope up to Mmax ∼106-108M⊙, production of strong primordial magnetic fields and a gravitational wave spectrum with present day peak strain amplitude of up to hc(νpeak)∼5×10−15 around νpeak∼4×10−8 Hz. |
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| Item Description: | Gesehen am 01.02.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.105.041301 |