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The early Universe
In the past few years one of the most exciting areas of research in physics has been the interdisciplinary field of cosmology and particle physics. The NSF's Institute for Theoretical Physics inExpand
The Early Universe
The Universe Observed: Thermodynamics in the Expanding Universe and Toward the Planck Epoch is concerned with big-Bang Nucleosynthesis, Baryogenesis, Phase Transitions, and Structure Formation. Expand
Big Bang Nucleosynthesis Predictions for Precision Cosmology
The determination of the primeval deuterium abundance has opened a precision era in big bang nucleosynthesis, making accurate predictions more important than ever before. We present in analytic formExpand
Big-bang nucleosynthesis enters the precision era
The last parameter of big-bang nucleosynthesis, the baryon density, is being pinned down by measurements of the deuterium abundance in high-redshift hydrogen clouds. When it is determined, it will
Cosmological Constraints on the Properties of Weakly Interacting Massive Particles
Considerations of the age and density of, as well as the evolution of structure in, the universe lead to constraints on the masses and lifetimes of weakly interacting massive particles (WIMPs). TheExpand
We have reexamined the nuclear inputs to big-bang nucleosynthesis using Monte Carlo realization of the cross-section data to directly estimate theoretical uncertainties for the yields of D , {supExpand
Constraining Dark Energy with Type Ia Supernovae and Large-Scale Structure
Measurements of the distances to type Ia supernovae have produced strong evidence that the expansion of the Universe is accelerating, implying the existence of a nearly uniform component of darkExpand
Spontaneous Creation of Almost Scale - Free Density Perturbations in an Inflationary Universe
The creation and evolution of energy-density perturbations are analyzed for the "new inflationary universe" scenario proposed by Linde, and Albrecht and Steinhardt. According to the scenario, theExpand
Is Cosmic Speed-Up Due to New Gravitational Physics?
We show that cosmic acceleration can arise due to very tiny corrections to the usual gravitational action of general relativity, of the form ${R}^{\ensuremath{-}n}$ with $ng0.$ This model eliminatesExpand
Big-bang nucleosynthesis and the baryon density of the universe
The agreement between the predicted and observed abundances of deuterium, helium-3, helium -4, and lithium-7 confirms the standard cosmology model and allows accurate determination of the baryon density, which is pivotal to the establishment of two dark-matter problems. Expand