Ab initio prediction of <sup>4</sup>He(d,γ)<sup>6</sup>Li at big-bang nucleosynthesis energies

ORAL

Abstract



The radiative capture 4He(d,γ)6Li is the dominant process in the Big Bang Nucleosynthesis (BBN) of 6Li. It therefore strongly influences the abundance ratio of 6Li/7Li., for which observational data are three orders of magnitude higher than BBN predictions. Because of the low cross section and the large experimental uncertainties, it is crucial to have accurate predictions. In this talk, I will present an ab initio calculation of 4He(d,γ)6Li [1], where all nucleons are active and interacting through chiral-EFT nucleon- and three-nucleon forces. After reviewing the ab initio no-core shell model with continuum method, I will show our results which are in excellent agreement with the recent LUNA data [2]. I will also discuss the importance of each electromagnetic transitions on 4He(d,γ)6Li at BBN energies.

[1] Hebborn et al. arXiv:2203.15914

[2] Anders et al. Phys. Rev. Lett. 113, 042501 (2014).

*This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under the FRIB Theory Alliance Award No. DE-SC0013617 and by LLNL under Contract No. DE-AC52-07NA27344.

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Presenters

  • Chloë Hebborn

    • Michigan State University

Authors

  • Chloë Hebborn

    • Michigan State University

  • Guillaume Hupin

    • IJCLab
    • IJClab

  • Konstantinos Kravvaris

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Sofia Quaglioni

    • Lawrence Livermore Natl Lab

  • Petr Navratil

    • TRIUMF

  • Peter H Gysbers

    • University of British Columbia / TRIUMF