2017/10/31 by Abhisek Saha, Soma Sanyal
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Diffusion #Galaxies: Formation, Evolution, Phenomena #Geodesic #Higgs boson #Non-critical string theory #Plane (geometry) #Space (punctuation) #String (physics) #String cosmology #String phenomenology #Universe #astro-ph.CO #hep-ph
paper · pdf · doi:10.1088/1475-7516/2018/03/022
11 pages and 8 figures. Accepted for publication in JCAP
openalex created_date 2017/11/10 · arxiv created 2018/03/09 · openalex publication_date 2018/03/13 · arxiv updated 2018/03/28 · openalex updated_date 2026/08/05
We study the diffusion of massive particles in the space time of an Abelian Higgs string. The particles in the early universe plasma execute Brownian motion. This motion of the particles is modeled as a two dimensional random walk in the plane of the Abelian Higgs string. The particles move randomly in the space time of the string according to their geodesic equations. We observe that for certain values of their energy and angular momentum, an overdensity of particles is observed close to the string. We find that the string parameters determine the distribution of the particles. We make an estimate of the density fluctuation generated around the string as a function of the deficit angle. Though the thickness of the string is small, the length is large and the overdensity close to the string may have cosmological consequences in the early universe.