Effective field theory analysis of the Coulomb breakup of the one-neutron halo nucleus 19 C
Artikel i vetenskaplig tidskrift, 2023

We analyse the Coulomb breakup of 19 C measured at 67A MeV at RIKEN. We use the Coulomb-Corrected Eikonal (CCE) approximation to model the reaction and describe the one-neutron halo nucleus 19 C within Halo Effective Field Theory (Halo EFT). At leading order we obtain a fair reproduction of the measured cross section as a function of energy and angle. The description is insensitive to the choice of optical potential, as long as it accurately represents the size of 18 C. It is also insensitive to the interior of the 19 C wave function. Comparison between theory and experiment thus enables us to infer asymptotic properties of the ground state of 19 C: these data put constraints on the one-neutron separation energy of this nucleus and, for a given binding energy, can be used to extract an asymptotic normalisation coefficient (ANC). These results are confirmed by CCE calculations employing next-to-leading order Halo EFT descriptions of 19 C: at this order the results for the Coulomb breakup cross section are completely insensitive to the choice of the regulator. Accordingly, this reaction can be used to constrain the one-neutron separation energy and ANC of 19 C.
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Publicerad i

European Physical Journal A

1434-6001 (ISSN) 1434-601X (eISSN)

Vol. 59 Nummer/häfte 11 art. nr 273

Kategorisering

Ämneskategorier (SSIF 2011)

Subatomär fysik

Identifikatorer

DOI

10.1140/epja/s10050-023-01181-7

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Senast uppdaterat

2023-12-01