Results 61 to 70 of about 22,632 (204)

Revisiting big-bang nucleosynthesis constraints on long-lived decaying particles [PDF]

, 2017
The authors provide a state of the art analysis of the effects of long-lived non-Standard Model massive particles, decaying during big-bang nucleosynthesis (BBN), on the primordial abundances of light elements. Besides updated standard BBN reaction rates,
M. Kawasaki, K. Kohri, T. Moroi, Y. Takaesu   +3 more
semanticscholar   +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

Outstanding problems in nuclear astrophysics: recent progress at TRIUMF

AIP Advances, 2014
Recent experimental and theoretical efforts at TRIUMF on nuclear reactions relevant to big bang nucleosynthesis, quiescent stellar fusion, classical novae, and Type I X-ray bursts are described.
B. Davids
doaj   +1 more source

Constraining axion dark matter with Big Bang Nucleosynthesis

Physics Letters B, 2014
We show that Big Bang Nucleosynthesis (BBN) significantly constrains axion-like dark matter. The axion acts like an oscillating QCD θ angle that redshifts in the early Universe, increasing the neutron–proton mass difference at neutron freeze-out.
Kfir Blum, Raffaele Tito D'Agnolo, Mariangela Lisanti, Benjamin R. Safdi   +3 more
doaj   +1 more source

7Be(n,α) and 7Be(n,p) cross-section measurement for the cosmological lithium problem at the n_TOF facility at CERN

EPJ Web of Conferences, 2017
The Cosmological Lithium Problem refers to the large discrepancy between the abundance of primordial 7Li predicted by the standard theory of Big Bang Nucleosynthesis and the value inferred from the so-called “Spite plateau” in halo stars.
Barbagallo M., Colonna N., Aberle O., Andrzejewski J., Audouin L., Bécares V., Bacak M., Balibrea J., Barros S., Bečvář F., Beinrucker C., Berthoumieux E., Billowes J., Bosnar D., Brugger M., Caamaño M., Calviño F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Castelluccio D.M., Cerutti F., Chen Y.H., Chiaveri E., Cortés G., Cortés-Giraldo M.A., Cosentino L., Damone L.A., Diakaki M., Domingo-Pardo C., Dressler R., Dupont E., Durán I., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Göbel K., García A.R., Gawlik A., Glodariu T., Gonçalves I.F., González E., Goverdovski A., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heftrich T., Heinitz S., Heyse J., Jenkins D.G., Jericha E., Käppeler F., Kadi Y., Katabuchi T., Kavrigin P., Ketlerov V., Khryachkov V., Kimura A., Kivel N., Kokkoris M., Krtička M., Leal-Cidoncha E., Lederer C., Leeb H., Lerendegui-Marco J., Meo S. Lo, Lonsdale S.J., Losito R., Macina D., Marganiec J., Martínez T., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E.A., Mendoza E., Mengoni A., Milazzo P.M., Mingrone F., Mirea M., Montesano S., Musumarra A., Nolte R., Oprea A., Patronis N., Pavlik A., Perkowski J., Porras J.I., Praena J., Quesada J.M., Rajeev K., Rauscher T., Reifarth R., Riego-Perez A., Rout P.C., Rubbia C., Ryan J.A., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schmidt S., Schumann D., Sedyshev P., Smith A.G., Stamatopoulos A., Tagliente G., Tain J.L., Tarifeño-Saldivia A., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weigand M., Weiss C., Wolf C., Woods P.J., Wright T., Žugec P.   +129 more
doaj   +1 more source

Hierarchical Bayesian Thermonuclear Rate for the 7Be(n,p)7Li Big Bang Nucleosynthesis Reaction [PDF]

Astrophysical Journal, 2019
Big Bang nucleosynthesis provides the earliest probe of standard model physics, at a time when the universe was less than 1000 seconds old. It determines the abundances of the lightest nuclides, which give rise to the subsequent history of the visible ...
R. D. de Souza, Tan Hong Kiat, A. Coc, C. Iliadis   +3 more
semanticscholar   +1 more source

Primordial Nucleosynthesis with a background magnetic field [PDF]

EPJ Web of Conferences, 2020
We present our recent detailed calculation of the impacts from a background magnetic field on Big Bang Nucleosynthesis (BBN). Namely, the magnetic field impacts on the electron-positron thermodynamics, time temper-ature relation and the screening ...
Luo Yudong, Kajino Toshitaka, Kusakabe Motohiko, A Famiano Michael   +3 more
doaj   +1 more source

Can We Draw Conclusions on Supernova Shock Wave Propagation Using Short‐Lived Radioactive Isotopes?

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT We run a three‐dimensional Galactic chemical evolution (GCE) model to follow the propagation of 53Mn (exclusively produced from type Ia supernovae, SNIa), 60Fe (exclusively produced from core‐collapse supernovae, CCSNe), 182Hf (exclusively produced from intermediate mass stars, IMSs), and 244Pu (exclusively produced from neutron star mergers ...
Benjamin Wehmeyer, Andrés Yagüe López, Benoit Côté, Maria K. Petö, Chiaki Kobayashi, Maria Lugaro   +5 more
wiley   +1 more source

Big Bang Nucleosynthesis in Visible and Hidden-Mirror Sectors

Advances in High Energy Physics, 2014
One of the still viable candidates for the dark matter is the so-called mirror matter. Its cosmological and astrophysical implications were widely studied, pointing out the importance to go further with research.
Paolo Ciarcelluti
doaj   +1 more source