Results 141 to 150 of about 66,893 (303)
Constraining f(T) teleparallel gravity by big bang nucleosynthesis [PDF]
The European Physical Journal C, 2017 We use Big Bang Nucleosynthesis (BBN) observational data on the primordial abundance of light elements to constrain f(T) gravity. The three most studied viable f(T) models, namely the power law, the exponential and the square-root exponential are ...
S. Capozziello +3 more
semanticscholar +1 more source
r -process nucleosynthesis from matter ejected in binary neutron star mergers [PDF]
, 2017 When binary systems of neutron stars merge, a very small fraction of their rest mass is ejected, either dynamically or secularly. This material is neutron-rich and its nucleosynthesis provides the astrophysical site for the production of heavy elements ...
L. Bovard +5 more
semanticscholar +1 more source
Coulomb screening in linear coasting nucleosynthesis
, 2015 We investigate the impact of coulomb screening on primordial nucleosynthesis in a universe having scale factor that evolves linearly with time. Coulomb screening affects primordial nucleosynthesis via enhancement of thermonuclear reaction rates.
Lohiya, Daksh, Singh, Parminder
core
Effects of a torsion field on Big Bang nucleosynthesis
, 1999 In this paper it is investigated whether torsion, which arises naturally in most theories of quantum gravity, has observable implications for the Big Bang nucleosynthesis.
C. N. Yang +18 more
core +1 more source
NEUTRINO EFFECTS IN NUCLEOSYNTHESIS [PDF]
Neutrino Physics, 2001 The nucleosynthesis within a Type II supernova occurs in an intense neutrino flux. I discuss some of the effects associated with neutrino interactions, including direct synthesis in the neutrino process, the role of neutrinos in controlling the r-process path and in postprocessing r-process products, and neutrino oscillation connections.
openaire +3 more sources
From the s-Process to the i-Process: A New Perspective on the Chemical Enrichment of Extrinsic Stars
GalaxiesSeparating stars enriched in the s- and r-processes of nucleosynthesis is usually achieved by analyzing the element ratios of s-process elements (like Ba or La) to r-process elements (like Eu).
Sophie Van Eck +11 more
doaj +1 more source
Upper limit to $\Omega_B$ in scalar-tensor gravity theories
, 1997 In a previous paper (Serna & Alimi 1996), we have pointed out the existence of some particular scalar-tensor gravity theories able to relax the nucleosynthesis constraint on the cosmic baryonic density.
Arai K. +5 more
core +2 more sources
Nuclear Physics B - Proceedings Supplements, 1995 13 pages, including 4 figures, to appear in the Proceedings of the Workshop on ``Theoretical and Phenomenological Aspects of Underground Physics" (TAUP'95), Suppl. Nucl. Phys. B (M. Fatas, ed.)
openaire +3 more sources
Recent Advances in Understanding R-Process Nucleosynthesis in Metal-Poor Stars and Stellar Systems
UniverseThe rapid neutron-capture process (r-process) is responsible for the creation of roughly half of the elements heavier than iron, including precious metals like silver, gold, and platinum, as well as radioactive elements such as thorium and uranium ...
Avrajit Bandyopadhyay, Timothy C. Beers
doaj +1 more source
Primordial Nucleosynthesis: A Cosmological Probe
, 2010 During its early evolution the Universe provided a laboratory to probe fundamental physics at high energies. Relics from those early epochs, such as the light elements synthesized during primordial nucleosynthesis when the Universe was only a few minutes
Gary Steigman, Lind
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