Showing 321 - 340 results of 673 for search '"nucleosynthesis"', query time: 0.17s Refine Results
  1. 321

    The formation of the milky way halo and its dwarf satellites: a NLTE-1D abundance analysis. IV. Segue 1, Triangulum ii , and Coma Berenices UFDs by Sitnova, TM, Mashonkina, LI, Tatarnikov, AM, Voziakova, OV, Burlak, MA, Pakhomov, Yu V, Jablonka, P, Neretina, MD, Frebel, A

    Published 2022
    “…Three stars in Segue 1, two stars in Coma Berenices, and Triangulum ii star have very low [Na/Mg] of −1.08 to −1.67 dex, which is usually attributed in the literature to an odd–even effect produced by nucleosynthesis in massive metal-free stars. We interpret this chemical property as a footprint of first stars, which is not blurred due to a small number of nucleosynthesis events that contributed to chemical abundance patterns of the sample stars. …”
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  2. 322

    New phenomenology from asymmetric dark matter by Lasenby, R

    Published 2015
    “…As the example of Standard Model nuclear physics and Big Bang Nucleosynthesis demonstrates, the properties of small-number composite states in strongly-coupled theories may be complicated, and sensitive to the precise details of the theory. …”
    Thesis
  3. 323

    More is different: Reconciling eV sterile neutrinos with cosmological mass bounds by Yong Tang

    Published 2015-11-01
    “…As the Universe cools down, flavor equilibrium between active and sterile species can be reached after big bang nucleosynthesis (BBN) epoch, but leading to a decrease of Neff. …”
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  4. 324

    Few-Body Reactions with the Trojan Horse Method by Rapisarda G.G., Spartá R., Tumino A.

    Published 2023-01-01
    “…In this paper it will describe some of the THM studies involving few-body system of interest for both nuclear physics and nuclear astrophysics, such as the sub-Coulomb proton-proton elastic scattering and the deuteron-deuteron fusion at energies of interest for primordial nucleosynthesis. Moreover, the role of the intercluster motion in nuclei used for THM measurement will be highlight for the discussed physics cases.…”
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    Article
  5. 325

    Evaluation of neutron capture cross section on 205Pb with photonuclear data by Iwamoto Nobuyuki, Shizuma Toshiyuki

    Published 2018-01-01
    “…The impact of the derived MACS on the stellar nucleosynthesis is investigated. It is found that the abundance of Tl is slightly enhanced due to the increase in the remaining abundance of 205Pb.…”
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  6. 326

    Application of Laboratory Atomic Physics to Some Significant Stellar Chemical Composition Questions by Christopher Sneden, James E. Lawler, Michael P. Wood

    Published 2018-08-01
    “…This brief review highlights some current issues in Galactic stellar nucleosynthesis, and some recent laboratory studies by the Wisconsin atomic physics group that have direct application to stellar spectroscopy to advance our understanding of the chemical evolution of our Galaxy. …”
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    Article
  7. 327

    A Review of Quintessential Inflation by Jaume de Haro, Llibert Aresté Saló

    Published 2021-10-01
    “…In addition, while considering the reheating to be due to the gravitational production of superheavy particles conformally coupled to gravity, we checked that the considered scenarios do not suffer problems due to the overproduction of gravitational waves at the end of inflation, and thus the validity of Big Bang nucleosynthesis is preserved.…”
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  8. 328

    Quintessential inflation at low reheating temperatures by Llibert Aresté Saló, Jaume de Haro

    Published 2017-11-01
    “…Abstract We have tested some simple quintessential inflation models, imposing the requirement that they match with the recent observational data provided by the BICEP and Planck team and leading to a reheating temperature, which is obtained via gravitational particle production after inflation, supporting the nucleosynthesis success. Moreover, for the models coming from supergravity one needs to demand low temperatures in order to avoid problems such as the gravitino overproduction or the gravitational production of moduli fields, which are obtained only when the reheating temperature is due to the production of massless particles with a coupling constant very close to its conformal value.…”
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  9. 329

    What could we learn about high energy particle physics from cosmological observations at largest spatial scales ? by Gorbunov Dmitry

    Published 2017-01-01
    “…The very well known example of cosmology testing particle physics is the number of relativistic particles (photons and three active neutrinos within the Standard Model) at primordial nucleosynthesis. These days the earliest moment we can hope to probe with present cosmological data is the early time inflation. …”
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  10. 330

    News on the slow neutron capture process in AGB stars by Vescovi Diego

    Published 2023-01-01
    “…In this view, we discuss recent results from new AGB models including the effects of mixing triggered by magnetic fields, and show comparisons of the related s-process nucleosynthesis with available observations.…”
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    Article
  11. 331

    Nitrogen isotopes in the interstellar medium: A chemical journey across the Galaxy by Colzi Laura, Fontani Francesco, Rivilla Víctor M., Caselli Paola

    Published 2022-01-01
    “…The isotopic ratios are governed by two main processes: 1. chemical evolution of the whole Galaxy due to stellar nucleosynthesis; 2. local fractionation effects. In this Proceeding we report some results highlighting both processes towards massive star-forming regions.…”
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  12. 332

    Novel experimental techniques for neutron induced charge particle reaction studies in nuclear astrophysics by Yadav Chandrabhan, Friedman Moshe

    Published 2022-01-01
    “…Neutron induced reaction studies on various unstable and short-lived nuclei play a very important role in understanding the various nucleosynthesis processes occuring in astrophysics scenario. …”
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  13. 333

    Space-based measurement of the neutron lifetime using data from the neutron spectrometer on NASA's MESSENGER mission by Jack T. Wilson, David J. Lawrence, Patrick N. Peplowski, Vincent R. Eke, Jacob A. Kegerreis

    Published 2020-06-01
    “…This lifetime constrains the unitarity of the CKM matrix and is a key parameter for studies of Big-Bang nucleosynthesis. However, current laboratory measurements, using two independent approaches, differ by over 4σ. …”
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  14. 334

    New neutrino-nucleus reaction cross sections at solar, reactor and supernova neutrino energies by Suzuki Toshio, Honma Michio, Balantekin A. B., Kajino Toshitaka, Chiba Satoshi

    Published 2014-03-01
    “…New ν-induced reaction cross sections on 12C, 13C, 56Fe, 56Ni and 40Ar are presented, and predictions for nucleosynthesis in supernova explosions, ν-oscillation effects and low-energy reactor and solar neutrino detection are discussed based on these new cross sections.…”
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  15. 335

    Astrophysical relevance of the low-energy dipole strength of 206Pb by Tonchev A.P., Tsoneva N., Goriely S., Bhatia C., Arnold C.W., Hammond S.L., Kelley J.H., Kwan E., Lenske H., Piekarewicz J., Raut R., Rusev G., Shizuma T., Tornow W.

    Published 2018-01-01
    “…The new experimental information is used to reliably predict the neutron capture cross section of 205Pb, an important branch point nucleus along the s-process path of nucleosynthesis.…”
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  16. 336

    Cosmological implications of neutrinos by Sarkar, S

    Published 1997
    “…This data will also improve the nucleosynthesis bound on the number of neutrino species and test whether decays of relic neutrinos could have ionized the intergalactic medium.…”
    Journal article
  17. 337

    On the cosmological domain wall problem for the minimally extended supersymmetric standard model by Abel, S, Sarkar, S, White, P

    Published 1995
    “…Such terms are constrained by considerations of primordial nucleosynthesis, and also because (by not respecting the symmetry) they induce divergences which destabilise the hierarchy and reintroduce the μ-problem. …”
    Journal article
  18. 338

    On the Cosmological Domain Wall Problem for the Minimally Extended Supersymmetric Standard Model by Abel, SA, Sarkar, S, White, P

    Published 1995
    “…Such terms are constrained by considerations of primordial nucleosynthesis, and also by the fact that by not respecting the $Z_{3}$ symmetry they induce divergences which destabilise the hierarchy and reintroduce the $\mu$--problem. …”
    Journal article
  19. 339
  20. 340

    Flavor versus mass eigenstates in neutrino asymmetries: implications for cosmology by Gabriela Barenboim, William H. Kinney, Wan-Il Park

    Published 2017-09-01
    “…Abstract We show that, if they exist, lepton number asymmetries ( $$L_\alpha $$ L α ) of neutrino flavors should be distinguished from the ones ( $$L_i$$ L i ) of mass eigenstates, since Big Bang Nucleosynthesis (BBN) bounds on the flavor eigenstates cannot be directly applied to the mass eigenstates. …”
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