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ASTROPHYSICAL OBSERVATIONS OF EARLY UNIVERSE PHASE TRANSITIONS [PDF]
Modern Physics Letters A, 2004 After a review of CMBR correlations and recent observations, a study of possible CMBR observations of the QCD early universe phase transition is discussed. A model for the QCD bubble walls gives the surface tension found in lattice calculations, and a 1+1 dimensional treatment in this model for bubble collisions shows an interior gluonic wall, a disk ...
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SUPERCOOLING AND NUCLEATION IN PHASE TRANSITIONS OF THE EARLY UNIVERSE [PDF]
Modern Physics Letters A, 1996 The three phase transitions (the GUT, the electroweak and the quark-hadron), which the universe is assumed to have undergone, produce very important physical effects if they are assumed to be of first-order. It is also important that enough supercooling is produced at these transitions so that the rate of nucleation of the lower temperature phase out ...
Banerjee, B., Gavai, R. V.
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A Little Inflation in the Early Universe at the QCD Phase Transition [PDF]
Physical Review Letters, 2010 We explore a scenario that allows for a strong first order phase-transition of QCD at non-negligible baryon number in the early universe and its possible cosmological observable consequences. The main assumption is a quasi-stable QCD-vacuum state that leads to a short period of inflation, consequently diluting the net baryon to photon ratio to it's ...
Boeckel, Tillmann +1 more
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Dark radiation as a probe for a phase transition in the early Universe
Physical Review D, 2022 The cosmological constant is not necessarily small in the early universe. If a scalar field obtains a vacuum expectation value after a phase transition (PT), a possibly large cosmological constant could present before PT. The early cosmological constant (ECC) and the PT process may be detectable from dark radiation (DR) today, such as in the cosmic ...
Zihang Wang, Lijing Shao
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Phase transitions in the early universe
, 2023 Phase transitions are a generic prediction of models in particle physics. In the Standard Model, for example, there are two phase transitions: the QCD confinement transition and the electroweak phase transition, both occurring in the very early stages of the universe. Many extensions to the Standard Model predict new phase transitions, all occurring at
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Journal of High Energy Physics, 2023 5D warped extra dimension models with multiple 3-branes can naturally realize multiple hierarchical mass scales which are ubiquitous in physics beyond the Standard Model.
Sudhakantha Girmohanta +3 more
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Boosted dark matter from primordial black holes produced in a first-order phase transition
Journal of High Energy Physics, 2023 During a cosmological first-order phase transition in a dark sector, fermion dark matter particles χ can form macroscopic Fermi balls that collapse to primordial black holes (PBHs) under certain conditions.
Danny Marfatia, Po-Yan Tseng
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Phase Transitions and Topological Defects in the Early Universe [PDF]
Australian Journal of Physics, 1997 Our present theories of particle physics and cosmology, taken together, suggest that very early in its history, the universe underwent a series of phase transitions, at which topological defects, similar to those formed in some condensed matter transitions, may have been created.
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Quark-hadron phase transitions in the viscous early universe [PDF]
Physical Review D, 2012 Based on hot big bang theory, the cosmological matter is conjectured to undergo QCD phase transition(s) to hadrons, when the universe was about $1-10 μ$s old. In the present work, we study the quark-hadron phase transition, by taking into account the effect of the bulk viscosity.
Harko, TC, Tawfik, T
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Relevant dilaton stabilization
Journal of High Energy Physics, 2023 We propose a simple modification of the Goldberger-Wise mechanism for stabilizing the scale of spontaneously broken conformal theories. The source of explicit conformal symmetry breaking is a relevant operator with a small coefficient, as opposed to the ...
Csaba Csáki +3 more
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