Bayesian analysis of the Coulomb breakup of C19

Abstract

Coulomb breakup is a common experimental technique to study the structure of halo nuclei. Coupling a halo effective field theory (Halo-EFT) description of these nuclei to accurate reaction models provides an ideal tool to analyze such experiments. In particular, it enables us to sample the space of the low-energy constants of this EFT within a Bayesian approach. This allows us to infer nuclear-structure information from the reaction data in a systematic and reliable way. Moreover, it provides an estimate of the uncertainty on those structure observables. We apply this to re-analyze the Coulomb breakup of ¹⁹C measured on Pb at 67 MeV/nucleon in RIKEN [T. Nakamura et al. Phys. Rev. Lett. 83, 1112 (1999)]. We obtain a new and more accurate value for the one-neutron separation energy S_n(¹⁹C) = 0.60 ± 0.02 MeV and an improved estimate of the asymptotic normalization constant of its bound state C_1/2⁺ = 0.85 ± 0.02 fm^−1/2. In addition, we estimate the uncertainty related to other model inputs at about 15% on both structure observables.

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BibTeX RIS

BibTeX

@misc{bozet2026bayesian,
  title = {{Bayesian analysis of the Coulomb breakup of C19}},
  author = {Quentin Bozet and Pierre Capel and Isak Svensson},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.32331},
  eprint = {2610.32331},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.32331},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Bayesian analysis of the Coulomb breakup of C19
AU  - Quentin Bozet
AU  - Pierre Capel
AU  - Isak Svensson
PY  - 2026
DA  - 2026/10/23
PB  - arXiv
DO  - 10.48550/arxiv.2610.32331
UR  - https://arxiv.org/abs/2610.32331
AB  - Coulomb breakup is a common experimental technique to study the structure of halo nuclei. Coupling a halo effective field theory (Halo-EFT) description of these nuclei to accurate reaction models provides an ideal tool to analyze such experiments. In particular, it enables us to sample the space of the low-energy constants of this EFT within a Bayesian approach. This allows us to infer nuclear-structure information from the reaction data in a systematic and reliable way. Moreover, it provides an estimate of the uncertainty on those structure observables. We apply this to re-analyze the Coulomb breakup of ^19C measured on Pb at 67 MeV/nucleon in RIKEN [T. Nakamura et al. Phys. Rev. Lett. 83, 1112 (1999)]. We obtain a new and more accurate value for the one-neutron separation energy S_n(^19C) = 0.60 ± 0.02 MeV and an improved estimate of the asymptotic normalization constant of its bound state C_1/2^+ = 0.85 ± 0.02 fm^−1/2. In addition, we estimate the uncertainty related to other model inputs at about 15% on both structure observables.
ER  -

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