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Cosmic Microwave Background as a Thermal Gas of SU(2) Photons : Implications for the High$-z$ Cosmological Model and the Value of H₀

Hahn, Steffen; Hofmann, Ralf

Abstract:
Presently, we are facing a tension in the most basic cosmological parameter, the Hubble constant . This tension arises when fitting the Lambda-cold-dark-matter model (CDM) to the high-precision temperature-temperature (TT) power spectrum of the Cosmic Microwave Background (CMB) and to local cosmological observations. We propose a resolution of this problem by postulating that the thermal photon gas of the CMB obeys an SU() rather than U() gauge principle, suggesting a high- cosmological model which is void of dark-matter. Observationally, we rely on precise low-frequency intensity measurements in the CMB spectrum and on a recent model independent (low-) extraction of the relation between the comoving sound horizon at the end of the baryon drag epoch and (). We point out that the commonly employed condition for baryon-velocity freeze-out is imprecise, judged by a careful inspection of the formal solution to the associated Euler equation. As a consequence, the above-mentioned tension actually transforms into a discrepancy. To make contact with successful low-  CDM cosmology we propose an interpolation based on percolated/depercolated vortices of a Planck-scale axion condensate. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000076832
Veröffentlicht am 23.11.2017
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2017
Sprache Englisch
Identifikator ISSN: 1687-7357, 1687-7365
urn:nbn:de:swb:90-768320
KITopen-ID: 1000076832
HGF-Programm 51.03.06 (POF III, LK 01)
Theoretische Astroteilchenphysik
Erschienen in Advances in high energy physics
Band 2017
Seiten 1–9
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Scopus
Web of Science
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