Results 81 to 90 of about 20,829 (241)

The evolving Planck mass in classically scale-invariant theories

Journal of High Energy Physics, 2017
We consider classically scale-invariant theories with non-minimally coupled scalar fields, where the Planck mass and the hierarchy of physical scales are dynamically generated.
K. Kannike, M. Raidal, C. Spethmann, H. Veermäe   +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

Activation measurement of the 3He(alpha,gamma)7Be cross section at low energy

, 2006
The nuclear physics input from the 3He(alpha,gamma)7Be cross section is a major uncertainty in the fluxes of 7Be and 8B neutrinos from the Sun predicted by solar models and in the 7Li abundance obtained in big-bang nucleosynthesis calculations.
A. Formicola, A. Guglielmetti, A. Lemut, B. Limata, C. Broggini, C. Gustavino, C. Rolfs, C. Rolfs, C. Rossi Alvarez, D. Bemmerer, E. Somorjai, F. Confortola, F. Strieder, F. Terrasi, G. Gervino, G. Imbriani, Gy. Gyürky, H. Costantini, H. P. Trautvetter, M. Junker, M. Laubenstein, M. Marta, O. Straniero, P. Bonifacio, P. Corvisiero, P. Prati, R. Bonetti, R. Menegazzo, V. Lozza, V. Roca, Z. Elekes, Zs. Fülöp   +31 more
core   +1 more source

The evolution and history of Vinca alkaloids: From the Big Bang to the treatment of pediatric acute leukemia

Pediatric Blood &Cancer, Volume 71, Issue 11, November 2024.
Abstract An attractive flower from the island of Madagascar has in part saved the lives of thousands of children with acute lymphoblastic leukemia (ALL). Random mutations and alterations to the genome led to the evolution of genes encoding enzymes, which would provide the periwinkle flower an arsenal of secondary metabolites to survive within the ...
Jeffrey W. Taub, Steven A. Buck, Ana C. Xavier, Holly Edwards, Larry H. Matherly, Yubin Ge   +5 more
wiley   +1 more source

Indirect Measurement of the 3He(n,p)3H Reaction Cross Section at Big Bang Energies

The Astrophysical Journal
Neutron-induced nuclear reactions play an important role in the Big Bang Nucleosynthesis. Their excitation functions are, from an experimental point of view, usually difficult to measure.
R. G. Pizzone, M. L. Sergi, A. A. Oliva, T. Zanatta-Martinez, L. Lamia, R. Spartá, G. L. Guardo, M. La Cognata, G. D’Agata, S. Palmerini, A. Tumino, M. Costa, D. Cittadino, A. Di Pietro, P. Figuera, I. Indelicato, A. Massara, S. Cherubini, G. G. Rapisarda, S. Romano, C. Spampinato, M. Couder, W. Tan, M. Wiescher, D. Lattuada, M. Gulino, V. Burjan, J. Mrazek, M. La Commara, M. Mazzocco, P. M. Prajapati, S. Aguilar, T. Anderson, D. Bardayan, D. Blankstein, L. Callahan, A. Clark, B. Frentz, A. Gula, M. Hall, S. L. Henderson, R. Kelmar, Q. Liu, J. Long, A. Majundar, S. McGiunness, A. Nelson, P. O’Malley, C. Seimour, M. Skulski, J. Wilkinson, S. M. Cha, K. Y. Chae, M. S. Kwag, S. Typel   +54 more
doaj   +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

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

BIG-BANG NUCLEOSYNTHESIS WITH THE NACRE COMPILATION [PDF]

, 2001
Contribution to the "Cosmic Evolution" conference, to celebrate the 60th birthday of Jean Audouze and James W ...
Coc, A., Vangioni-Flam, E., Casse, M.
openaire   +4 more sources

3He(α,γ)7Be cross section measured using complementary techniques

EPJ Web of Conferences, 2014
The astrophysical S-factor for the 3He(α,γ)7Be reaction plays an important role in the Solar Standard Model and in the Big Bang Nucleosynthesis scenario. The advances from two recent experiments performed using complementary techniques at center of mass (
Carmona-Gallardo M., Rojas A., Borge M.J.G., Davids B., Fulton B.R., Hass M., Nara Singh B.S., Ruiz C., Tengblad O.   +8 more
doaj   +1 more source

The evolution of nuclides

Вісник Астрономічної школи, 2001
In the brief review the modern problems of the further evolution nuclides after formation of easiest of them H, D, 3He, 4He and, probably, 7Li in 100 seconds after the Big Bang are discussed.The possible ways of evolution nuclides in result are ...
N. S. Komarov
doaj   +1 more source