Primordial nucleosynthesis in higher dimensional cosmology
نویسندگان
چکیده
منابع مشابه
Primordial Nucleosynthesis: from precision cosmology to fundamental physics
We present an up-to-date review of Big Bang Nucleosynthesis (BBN). We discuss the main improvements which have been achieved in the past two decades on the overall theoretical framework, summarize the impact of new experimental results on nuclear reaction rates, and critically re-examine the astrophysical determinations of light nuclei abundances. We report then on how BBN can be used as a powe...
متن کاملPrimordial Nucleosynthesis as a test of variable rest masses 5-dimensional cosmology
The deviation of primordial Helium production due to a variation on the difference between the rest masses of the nucleons is presented. It is found an upper bound δ(M n −M p ) ∼ 0.129 MeV, between the present and nucleosynthesis epochs. This bound is used to analyze Wesson’s theory of gravitation; as a result, it is ruled out by observation.
متن کاملPrimordial Nucleosynthesis
Primordial nucleosynthesis provides a probe of the Universe during its early evolution. Given the progress exploring the constituents, structure, and recent evolution of the Universe, it is timely to review the status of Big Bang Nucleosynthesis (BBN) and to confront its predictions, and the constraints which emerge from them, with those derived from independent observations of the Universe at ...
متن کاملNew results in primordial nucleosynthesis
Big Bang Nucleosynthesis (BBN) is one of the most powerful tools to study fundamental interactions since light nuclei abundances crucially depend on many elementary particle properties, like the number of effective neutrino degrees of freedom, Nν . At the moment, however, recent data on Hemass fraction, Y4, and Deuterium (D) and Li abundances, Y2 ≡ D/H and Y7 ≡ 7 Li/H , produced during BBN are ...
متن کاملPrimordial Nucleosynthesis : Accurate Predictions
Big Bang Nucleosynthesis (BBN) represents a key subject of modern cosmology since it is a powerful tool to study fundamental interactions. In the recent years, the improvement on the measurement accuracy of light primordial nu-clei abundances allowed BBN to enter in a sort of precision era. In view of this, a great theoretical effort has been devoted to make theoretical predictions comparably a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2009
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921310003844