Results 61 to 70 of about 20,829 (241)

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

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

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

Inhomogeneous Big-Bang Nucleosynthesis in Light of Recent Observations [PDF]

, 1998
We consider inhomogeneous big bang nucleosynthesis in light of the present observational situation. Different observations of He-4 and D disagree with each other, and depending on which set of observations one uses, the estimated primordial He-4 ...
Kainulainen, K., Kurki-Suonio, H., Sihvola, E.   +2 more
core   +2 more sources

BIG BANG NUCLEOSYNTHESIS: AN UPDATE

International Journal of Modern Physics A, 1996
The current status of big bang nucleosynthesis is reviewed with an emphasis on the comparison between the observational determination of the light element abundances of D , 3 He , 4 He and 7 Li and the predictions from theory. In particular, we present new analyses for 4 He and 7 Li .
Keith A. Olive, Sean T. Scully
openaire   +4 more sources

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

Lithium-Beryllium-Boron : Origin and Evolution [PDF]

, 1999
The origin and evolution of Lithium-Beryllium-Boron is a crossing point between different astrophysical fields : optical and gamma spectroscopy, non thermal nucleosynthesis, Big Bang and stellar nucleosynthesis and finally galactic evolution. We describe
Anders, Angulo, Audouze, Bernas, Biermann, Binns, Boesgaard, Boesgaard, Burbidge, Bykov, Bykov, Bykov, Cassé, Cassé, Cassé, Cassé, Caughlan, Cayrel, Cayrel, Cayrel, Cecil, Chaussidon, Drury, Duncan, Duncan, Elisabeth Vangioni-Flam, Ellison, Ellison, Fields, Fields, Fields, Fields, Fulbright, García-López, Gilmore, Hartmann, Higdon, Hobbs, Hobbs, Hobbs, Hobbs, Israelian, Jean Audouze, Jones, Kiener, Kiselman, Kiselman, Lemoine, Lemoine, Lingenfelter, Mac Williams, Meneguzzi, Meneguzzi, Mewaldt, Meyer, Meyer, Meyer, Meynet, Michel Cassé, Mohr, Molaro, Molaro, Mori, Moskalenko, Nollet, Olive, Parizot, Parizot, Parizot, Parizot, Parizot, Pinsonneault, Raisbeck, Ramaty, Ramaty, Ramaty, Ramaty, Read, Rebolo, Reeves, Reeves, Ryan, Ryan, Ryan, Ryan, Schramm, Seo, Shapiro, Smith, Steigman, Strong, Strong, Tatischeff, Thielemann, Thomas, Thomas, Thévenin, Vangioni-Flam, Vangioni-Flam, Vangioni-Flam, Vangioni-Flam, Vangioni-Flam, Vauclair, Weaver, Webber, Westphal, Woosley, Woosley   +107 more
core   +3 more sources

Big-bang nucleosynthesis and leptogenesis in the CMSSM [PDF]

Physical Review D, 2018
27 pages, 4 ...
Kubo, Munehiro, Sato, Joe, Shimomura, Takashi, Takanishi, Yasutaka, Yamanaka, Masato   +4 more
openaire   +3 more sources

Big-Bang Nucleosynthesis after Planck [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
We assess the status of big-bang nucleosynthesis (BBN) in light of the finalPlanckdata release and other recent developments, and in anticipation of future measurements.Planckdata from the recombination era fix the cosmic baryon density to 0.9% precision, and now damping tail measurements determine the helium abundance and effective number of neutrinos
Keith A. Olive, Charles D. Young, Brian D. Fields, Tsung Han Yeh   +3 more
openaire   +3 more sources

Inhomogeneous big bang nucleosynthesis revisited [PDF]

Physical Review D, 2006
We reanalyze the allowed parameters for inhomogeneous big bang nucleosynthesis in light of the WMAP constraints on the baryon-to-photon ratio and a recent measurement which has set the neutron lifetime to be 878.5 +/- 0.7 +/- 0.3 seconds. For a set baryon-to-photon ratio the new lifetime reduces the mass fraction of He4 by 0.0015 but does not ...
Juan F. Lara, Toshitaka Kajino, Grant J. Mathews   +2 more
openaire   +3 more sources