2008/03/31 by J A R Cembranos, J. A. R. Cembranos, A de la Cruz-Dombriz +5 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Brane #Cosmic background radiation #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Electroweak interaction #Particle physics theoretical and experimental studies #Planck #Texture (cosmology) #Universe #astro-ph #gr-qc #hep-ph
paper · pdf · doi:10.1088/1475-7516/2008/10/039
published as JCAP 0810:039,2008 · 8 pages. New comments and references included. Final version to appear in JCAP
arxiv created 2008/10/24 · openalex publication_date 2008/10/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
One of the most striking features found in the cosmic microwave background data is the presence of an anomalous cold spot (CS) in the temperature maps made by the Wilkinson Microwave Anisotropy Probe (WMAP). This CS has been interpreted as the result of the presence of a collapsing texture, perhaps coming from some early universe grand unified theory (GUT) phase transition. In this work we propose an alternative explanation based on a completely different kind of texture which appears in a natural way in a broad class of brane-world models. This type of texture, known as a brane-skyrmion, can be understood as a hole in the brane which makes it possible to pass through them along the extra-dimensional space. The typical scales needed for the proposed brane-skyrmions to correctly describe the observed CS can be as low as the electroweak scale.