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Three-Body Halo States in Effective Field Theory: Renormalization and Three-Body Interactions in the Helium-6 System

Emil Ryberg (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Christian Forssén (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Lucas Platter
Few-Body Systems (0177-7963). Vol. 58 (2017), 4, p. Article no. UNSP 143.
[Artikel, refereegranskad vetenskaplig]

In this paper we study the renormalization of Halo effective field theory applied to the Helium-6 halo nucleus seen as an alpha-neutron-neutron three-body state. We include the 0(+) dineutron channel together with both the 3/2(-) and 1/2(-) neutron-alpha channels into the field theory and study all of the six lowest-order three-body interactions that are present. Furthermore, we discuss three different prescriptions to handle the unphysical poles in the P-wave two-body sector. In the simpler field theory without the 1/2(-) channel present we find that the bound-state spectrum of the field theory is renormalized by the inclusion of a single three-body interaction. However, in the field theory with both the 3/2(-) and 1/2(-) included, the system can not be renormalized by only one three-body operator.

Nyckelord: Nuclei, Scattering, Forces, EFT

Denna post skapades 2017-08-14. Senast ändrad 2017-09-06.
CPL Pubid: 251104


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Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)



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Denna publikation är ett resultat av följande projekt:

Ab initio approach to nuclear structure and reactions (++) (ANSR) (EC/FP7/240603)