2002/11/30 by S. P. Sanyal, Soma Sanyal · 1 citation
Physics and Astronomy · #Astrophysics #Asymmetry #Baryon #Baryon asymmetry #Baryon number #Condensed matter physics #Cosmology and Gravitation Theories #Electron #Electroweak interaction #Hadron #High-Energy Particle Collisions Research #Lepton #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Phase transition #Physics #Quark #Universe #hep-ph
paper · pdf · doi:10.1103/physrevd.67.074009
published as Phys.Rev. D67 (2003) 074009 · 16 pages, no figures, minor changes, version to appear in Phys. Rev. D
arxiv created 2003/03/06 · openalex publication_date 2003/04/14 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Baryon number inhomogeneities may be generated during the epoch when the baryon asymmetry of the universe is produced, e.g. at the electroweak phase transition. The regions with excess baryon number will have a lower temperature than the background temperature of the universe. Also the value of the quark hadron transition temperature Tc will be different in these regions as compared to the background region. Since a first-order quark hadron transition is very susceptible to small changes in temperature, we investigate the effect of the presence of such baryonic lumps on the dynamics of the quark-hadron transition. We find that the phase transition is delayed in these lumps for significant overdensities. Consequently, we argue that baryon concentration in these regions grows by the end of the transition. We briefly discuss some models which may give rise to such high overdensities at the onset of the quark-hadron transition.