Results 251 to 260 of about 41,842 (275)

Setup commissioning for an improved measurement of the D(p,$$\gamma $$)$$^3$$He cross section at Big Bang Nucleosynthesis energies

European Physical Journal A, 2020
Among the reactions involved in the production and destruction of deuterium during Big Bang Nucleosynthesis, the deuterium-burning D(p,gamma)3He reaction has the largest uncertainty and limits the precision of theoretical estimates of primordial ...
V. Mossa, K. Stöckel, F. Cavanna, F. Ferraro, M. Aliotta, F. Barile, D. Bemmerer, A. Best, A. Boeltzig, C. Broggini, C. Bruno, A. Caciolli, L. Csedreki, T. Chillery, G. Ciani, P. Corvisiero, T. Davinson, R. Depalo, A. Leva, Z. Elekes, E. Fiore, A. Formicola, Z. Fülöp, G. Gervino, A. Guglielmetti, C. Gustavino, G. Gyürky, G. Imbriani, M. Junker, I. Kochanek, M. Lugaro, L. Marcucci, P. Marigo, E. Masha, R. Menegazzo, F. Pantaleo, V. Paticchio, R. Perrino, D. Piatti, P. Prati, L. Schiavulli, O. Straniero, T. Szücs, M. P. Tak'acs, D. Trezzi, S. Zavatarelli, G. Zorzi   +46 more
semanticscholar   +1 more source

On the problem of big bang nucleosynthesis [PDF]

Astrophysics and Space Science, 1995
Supporters of the standard Big Bang theory point to the abundances of light elements, predicted by Big Bang Nucleosynthesis (BBN) as one of the main observational supports of the theory. However, current data no longer confirm BBN. Instead, measurements of the abundances of He3, He4, and D clearly contradict BBN at more than a 3σ level, eliminating a ...
openaire   +1 more source

Big bang nucleosynthesis

Nuclear Physics A, 2001
Abstract The precision of measurements in modern cosmology has made huge strides in recent years, with measurements of the cosmic microwave background and the determination of the Hubble constant now rivaling the level of precision of the predictions of big bang nucleosynthesis.
openaire   +2 more sources

Catalyzed Big-Bang nucleosynthesis

Canadian Journal of Physics, 2008
We point out that the existence of metastable, τ >103 s, negatively charged electroweak-scale particles (X–) alters the predictions for lithium and other primordial elemental abundances for A > 4 via the formation of bound states with nuclei during Big-Bang nucleosynthesis (BBN).
Maxim Pospelov, Maxim Pospelov
openaire   +2 more sources

Big bang nucleosynthesis: An update

AIP Conference Proceedings, 2013
An update on the standard model of big bang nucleosynthesis (BBN) is presented. With the value of the baryon-tophoton ratio determined to high precision by WMAP, standard BBN is a parameter-free theory. In this context, the theoretical prediction for the abundances of D, 4He, and 7Li is discussed and compared to their observational determination. While
openaire   +2 more sources

Enhanced triple-α reaction reduces proton-rich nucleosynthesis in supernovae

Nature, 2020
Luke F Roberts, Shilun Jin, Maria Coro
exaly  

Big Bang nucleosynthesis [PDF]

, 2018
openaire   +3 more sources

Origin of the heaviest elements: The rapid neutron-capture process

Reviews of Modern Physics, 2021
A Aprahamian, Friedrich-karl Thielemann, John J Cowan   +2 more
exaly  

Big bang nucleosynthesis: Present status

Reviews of Modern Physics, 2016
Brian D Fields
exaly  

Nucleosynthesis and remnants in massive stars of solar metallicity

Physics Reports, 2007
Alexander Heger
exaly