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

• Verfasst von: Boeckel, Moritz Tillmann [VerfasserIn]
• Verfasst von: Schaffner-Bielich, Jürgen [VerfasserIn]
• Titel: A little inflation in the early universe at the QCD phase transition
• Verf.angabe: Tillmann Boeckel and Jürgen Schaffner-Bielich
• E-Jahr: 2010
• Jahr: 19 July 2010
• Umfang: 4 S.
• Fussnoten: Gesehen am 01.02.2023
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2010
• Band/Heft Quelle: 105(2010), 4, Artikel-ID 041301, Seite 1-4
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.105.041301
• Datenträger: Online-Ressource
• Sprache: eng
• Bibliogr. Hinweis: Errata: Boeckel, Moritz Tillmann: Erratum: A little inflation in the early universe at the QCD phase transition [Phys. Rev. Lett. 105, 041301 (2010)]
• K10plus-PPN: 1832902331

Abstract

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.