Results 51 to 60 of about 21,366 (192)

The violent Universe: the Big Bang [PDF]

, 2010
Four lectures on Big Bang cosmology, including microwave background radiation, Big Bang nucleosynthesis, dark matter, inflation, and baryogenesis.Comment: 47 pages, 19 figures, Set of four lectures given at the 2009 European School of High-Energy ...
Olive, Keith A.
core   +1 more source

Fermi Degenerate Antineutrino Star Model of Dark Energy

Advances in Astronomy, Volume 2020, Issue 1, 2020., 2020
When the Large Hadron Collider resumes operations in 2021, several experiments will directly measure the motion of antihydrogen in free fall for the first time. Our current understanding of the universe is not yet fully prepared for the possibility that antimatter has negative gravitational mass.
Tom F. Neiser, Zdzislaw E. Musielak
wiley   +1 more source

New models and big bang nucleosynthesis constraints in f(Q) gravity

European Physical Journal C: Particles and Fields, 2023
The f(Q) theories of modified gravity arise from the consideration of non-metricity as the basic geometric quantity, and have been proven to be very efficient in describing the late-time Universe.
Fotios K. Anagnostopoulos, Viktor Gakis, Emmanuel N. Saridakis, Spyros Basilakos   +3 more
doaj   +1 more source

Big Bang Nucleosynthesis (BBN) and Non-Standard Physics

EPJ Web of Conferences, 2018
A brief overview on standard big bang nucleosynthesis (shortly, SBBN) is presented. First, we describe the outcome of the SBBN concerning the abundances of the light elements up to 7Li.
Makki Tahani, El Eid Mounib
doaj   +1 more source

Gravitational wave and CMB probes of axion kination

Journal of High Energy Physics, 2022
Rotations of an axion field in field space provide a natural origin for an era of kination domination, where the energy density is dominated by the kinetic term of the axion field, preceded by an early era of matter domination.
Raymond T. Co, David Dunsky, Nicolas Fernandez, Akshay Ghalsasi, Lawrence J. Hall, Keisuke Harigaya, Jessie Shelton   +6 more
doaj   +1 more source

A Review of Quintessential Inflation

Galaxies, 2021
Some of the most important quintessential inflation scenarios, such as the Peebles–Vilenkin model, are described in detail. These models are able to explain the early- and late-time accelerated expansions of our universe, and the phase transition from ...
Jaume de Haro, Llibert Aresté Saló
doaj   +1 more source

Study of 3He(n,p)3H reaction at cosmological energies with trojan horse method [PDF]

EPJ Web of Conferences, 2020
In the network of reactions present in the Big Bang nucleosynthesis, the 3He(n, p)3H has an important role which impacts the final 7Li abundance.
Spampinato C., Pizzone R.G., Spartà R., Couder M., Tan W., Burian V., Chae K.Y., D’Agata G., Guardo G.L., Indelicato I., Cognata M. La, Lamia L., Lattuada D., Mrazek J., Oliva A., Palmerini S., Prajapati P.M., Rapisarda G.G., Romano S., Sergi M.L., Spitaleri C., Tumino A., Wiescher M., Anguilar S., Bardyan D., Blankstein D., Boccioli L., Callahan L., Clark A., Frentz B., Hall M., Gula A., Henderson S., Kelmar R., Liu Q., Long J., Majumdar A., McGuinness S., Nelson A., O’Malley P., Seyymour C., Skulski M., Wilkinson J.   +42 more
doaj   +1 more source

Constraining Big Bang nucleosynthesis in f(T,B,TG,BG) gravity

Nuclear Physics B
Big Bang nucleosynthes describes a significant process in the early universe, responsible for the formation of light nuclei a while after the Big Bang explosion.
Abdul Malik Sultan, Manahil Ali, Shamaila Rani, Nadeem Azhar, N. Myrzakulov, Sanjar Shaymatov   +5 more
doaj   +1 more source

Guidelines to the THM [PDF]

EPJ Web of Conferences
Guidelines to the use of the indirect Trojan Horse Method to get cross sections of interest for nuclear astrophysics are given, using the example of the d+d reactions of interest for the Big Bang Nucleosynthesis model.
Spartà Roberta
doaj   +1 more source

Li isotopes in metal-poor halo dwarfs, a more and more complicated story [PDF]

, 2009
The nuclei of the lithium isotopes are fragile, easily destroyed, so that, at variance with most of the other elements, they cannot be formed in stars through steady hydrostatic nucleosynthesis.
Alonso, Boesgaard, Bonifacio, Cayrel, Cayrel, Charbonnel, François Spite, García Pérez, García Pérez, González Hernández, Hosford, Molaro, Monique Spite, Nissen Poul, Sbordone, Spite, Spite, Spite, Steffen, Talon   +19 more
core   +4 more sources