Showing 61 - 80 results of 673 for search '"nucleosynthesis"', query time: 0.22s Refine Results
  1. 61

    Big Bang nucleosynthesis and physics beyond the Standard Model by Sarkar, S

    Published 1996
    “…The Hubble expansion of galaxies, the $2.73\dK$ blackbody radiation background and the cosmic abundances of the light elements argue for a hot, dense origin of the universe --- the standard Big Bang cosmology --- and enable its evolution to be traced back fairly reliably to the nucleosynthesis era when the temperature was of $\Or(1)$ MeV corresponding to an expansion age of $\Or(1)$ sec. …”
    Journal article
  2. 62

    Nucleosynthesis bounds on a time-varying cosmological 'constant' by Birkel, M, Sarkar, S

    Published 1996
    “…We constrain proposed phenomenological models for a vacuum energy which decays with the expansion of the universe from considerations of standard big bang nucleosynthesis. Several such models which attempt to solve the cosmological age problem are disfavored or even ruled out.…”
    Journal article
  3. 63

    Common-Envelope Evolution: the Nucleosynthesis in Mergers of Massive Stars by Ivanova, N, Podsiadlowski, P, Spruit, H

    Published 2001
    “…We find that, for the lower end of the estimated mass-transfer rate, low-entropy, hydrogen-rich material can penetrate deep into the primary core where nucleosynthesis through the hot CNO cycle can take place and that the associated neutron exposure may be sufficiently high for significant s-processing. …”
    Conference item
  4. 64

    Revisiting big-bang nucleosynthesis constraints on dark-matter annihilation by Masahiro Kawasaki, Kazunori Kohri, Takeo Moroi, Yoshitaro Takaesu

    Published 2015-12-01
    “…We study the effects of dark-matter annihilation during the epoch of big-bang nucleosynthesis on the primordial abundances of light elements. …”
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    Article
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    Nucleosynthesis, Mixing Processes, and Gas Pollution from AGB Stars by Paolo Ventura, Flavia Dell’Agli, Marco Tailo, Marco Castellani, Ester Marini, Silvia Tosi, Marcella Di Criscienzo

    Published 2022-01-01
    “…In the latter sources, the variation of the surface chemical composition reflects the equilibria of the proton capture nucleosynthesis experienced at the base of the convective envelope. …”
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    Article
  11. 71

    Nucleosynthesis in heavy-ion collisions at the LHC via the Saha equation by Volodymyr Vovchenko, Kai Gallmeister, Jürgen Schaffner-Bielich, Carsten Greiner

    Published 2020-01-01
    “…Assuming that disintegration and regeneration reactions involving light nuclei proceed in relative chemical equilibrium after the chemical freeze-out of hadrons, their abundances are determined through the famous cosmological Saha equation of primordial nucleosynthesis and show no exponential dependence on the temperature typical for the thermal model. …”
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    Article
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    PRIMORDIAL NUCLEOSYNTHESIS, ADDITIONAL NEUTRINOS AND NEUTRAL CURRENTS FROM THE SUPERSTRING by Ellis, J, Enqvist, K, Nanopoulos, D, Sarkar, S

    Published 1986
    “…Their compatibility with the relaxed nucleosynthesis limits quoted above imposes an interesting lower limit on mZ′. …”
    Journal article
  14. 74

    Quantifying uncertainties in primordial nucleosynthesis without Monte Carlo simulations by Fiorentini, G, Lisi, E, Sarkar, S, Villante, F

    Published 1998
    “…We present a simple method for determining the (correlated) uncertainties of the light element abundances expected from big bang nucleosynthesis, which avoids the need for lengthy Monte Carlo simulations. …”
    Journal article
  15. 75

    Big-Bang nucleosynthesis (Particle Data Group mini-review) by Fields, B, Sarkar, S

    Published 2006
    “…A critical review is given of the current status of cosmological nucleosynthesis. In the framework of the Standard Model with 3 types of relativistic neutrinos, the baryon-to-photon ratio, $\eta$, corresponding to the inferred primordial abundances of deuterium and helium-4 is consistent with the independent determination of $\eta$ from WMAP observations of anisotropies in the cosmic microwave background. …”
    Journal article
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