Effect of pre-existing baryon inhomogeneities on the dynamics of quark-hadron transition

Abstract

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 $T_c$ 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 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.

arXiv comment16 pages, no figures, minor changes, version to appear in Phys. Rev. D

References in corpus (33)

• Lattice determination of the critical point of QCD at finite T and μ
• On the Phase Diagram of QCD
• Turning Around the Sphaleron Bound: Electroweak Baryogenesis in an Alternative Post-inflationary Cosmology
• Electroweak String Configurations with Baryon Number
• Detailed Stability Analysis of Electroweak Strings
• Electroweak Baryogenesis with Electroweak Strings
• SU(3) Latent Heat and Surface Tension from Tree Level and Tadpole Improved Actions
• The Effects of Electro-weak Phase Transition Dynamics on Baryogenesis and Primordial Nucleosynthesis
• Cosmic Strings and Electroweak Baryogenesis
• Large Scale Inhomogeneities from the QCD Phase Transition
• The Evolution of Non-Linear Sub-Horizon Scale Entropy Fluctuations in the Earlu Universe
• Local and Nonlocal Defect-Mediated Electroweak Baryogenesis
• The QCD phase transition in the inhomogeneous Universe
• Stabilization of Embedded Defects by Plasma Effects
• Cinderella Strings
• Instabilities of Electroweak Strings
• The evolution and persistence of dumbbells
• Electroweak baryogenesis mediated by locally supersymmetry-breaking defects
• Cosmic string induced sheet like baryon inhomogeneities at quark-hadron transition
• Electroweak Baryogenesis by Black Holes
• Cosmic Phase Transitions
• Baryogenesis, Domain Walls and the Role of Gravity
• Baryogenesis from Domain Walls in the Next-to-Minimal Supersymmetric Standard Model
• Are nontopological strings produced at the electroweak phase transition?
• Can the Quark-Gluon Plasma in the Early Universe be supercooled?
• A Mechanism for Baryogenesis in Low Energy Supersymmetry Breaking Models
• STABILITY OF Z-STRINGS IN STRONG MAGNETIC FIELDS
• Nucleosynthesis Constraints on Defect-Mediated Electroweak Baryogenesis
• Baryogenesis through gradual collapse of vortons
• Electroweak Baryogenesis in a Cold Universe
• Effect of Quark Scatter on Baryogenesis by Electroweak Strings
• Is baryon number violated when electroweak strings intercommute?
• Shapes of Cosmic Strings and Baryon Number Violation

Cited by in corpus (7)

• The first second of the Universe
• Supercooling and phase coexistence in cosmological phase transitions
• Baryon Inhomogeneity Generation in the Quark-Gluon Plasma Phase
• Generation of baryon inhomogeneities in the electroweak phase transition
• First-order cosmological phase transitions in the radiation dominated era
• Baryon inhomogeneities in a charged quark gluon plasma
• Decay of baryon inhomogeneities in an expanding universe