Results 31 to 40 of about 28,372 (160)

A New Left‐Right Symmetry Model

Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020
We propose a new L‐R symmetry model where the L‐R symmetry transformation reverses both the L‐R chirality and the local quantum number. We add to the model a global quantum number F whose value is one for fermions (minus one for antifermion) and vanishes for bosons.
Apriadi Salim Adam, Akmal Ferdiyan, Mirza Satriawan, Mariana Frank   +3 more
wiley   +1 more source

Neutrinos and Big Bang Nucleosynthesis

Advances in High Energy Physics, 2012
According to the standard models of particle physics and cosmology, there should be a background of cosmic neutrinos in the present Universe, similar to the cosmic microwave photon background.
Gary Steigman
doaj   +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

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

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

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

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

Big Bang Nucleosynthesis constraints on Barrow entropy

Physics Letters B, 2021
We use Big Bang Nucleosynthesis (BBN) data in order to impose constraints on the exponent of Barrow entropy. The latter is an extended entropy relation arising from the incorporation of quantum-gravitational effects on the black-hole structure ...
John D. Barrow, Spyros Basilakos, Emmanuel N. Saridakis   +2 more
doaj  

Effects of a torsion field on Big Bang nucleosynthesis [PDF]

Gen.Rel.Grav. 31 (1999) 1935-1939, 1999
In this paper it is investigated whether torsion, which arises naturally in most theories of quantum gravity, has observable implications for the Big Bang nucleosynthesis. Torsion can lead to spin flips amongst neutrinos thus turning them into sterile neutrinos.
arxiv   +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