Electric properties of the Beryllium-11 system in Halo EFT

Abstract

We compute E1 transitions and electric radii in the Beryllium-11 nucleus using an effective field theory that exploits the separation of scales in this halo system. We fix the leading-order parameters of the EFT from measured data on the 1/2+ and 1/2- levels in Be-11 and the B(E1) strength for the transition between them. We then obtain predictions for the B(E1) strength for Coulomb dissociation of the Be-11 nucleus to the continuum. We also compute the charge radii of the 1/2+ and 1/2- states. Agreement with experiment within the expected accuracy of a leading-order computation in this EFT is obtained. We also discuss how next-to-leading-order (NLO) corrections involving both s-wave and p-wave neutron-Be-10 interactions affect our results, and display the NLO predictions for quantities which are free of additional short-distance operators at this order. Information on neutron-Be-10 scattering in the relevant channels is inferred.

27 pages, 8 figures, final version

References in corpus (8)

• Nuclear Charge Radii of Be-7,9,10 and the one-neutron halo nucleus Be-11
• Ab Initio Many-Body Calculations of n-3H, n-4He, p-{3,4}He, and n-10Be Scattering
• Large basis ab initio shell model investigation of 9-Be and 11-Be
• Electromagnetic strength of neutron and proton single-particle halo nuclei
• Charge radii and electromagnetic moments of Li and Be isotopes from the ab initio no-core shell model
• Effective-range approach and scaling laws for electromagnetic strength in neutron-halo nuclei
• B(E1) Strengths from Coulomb Excitation of 11Be
• Scaling laws and higher-order effects in Coulomb excitation of neutron halo nuclei

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