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Article Dans Une Revue Phys.Rev.C Année : 2019

Embedding nuclear physics inside the unitary-limit window

Alejandro Kievsky
  • Fonction : Auteur
Michele Viviani
  • Fonction : Auteur

Résumé

The large values of the singlet and triplet scattering lengths locate the two-nucleon system close to the unitary limit, the limit in which these two values diverge. As a consequence, the system shows a continuous scale invariance, which strongly constrains the values of the observables, a well-known fact already noticed a long time ago. For example, the triton binding energy is correlated with other observables such as the doublet nucleon-deuteron scattering length or the α-particle binding energy. Moreover, the low-energy dynamics of these systems is universal; it does not depend on the details of the nuclear interaction. Instead, it depends on a few control parameters such as the (large) values of the scattering lengths and the triton binding energy. Using a potential model in order to vary the values of the scattering lengths, we study the spectrum of A=2,3,4,6 nuclei in the region between the unitary limit and the point where the scattering lengths get their physical values. In particular, we analyze how the binding energies emerge from the unitary limit forming the observed levels.

Dates et versions

hal-02088704 , version 1 (03-04-2019)

Identifiants

Citer

Mario Gattobigio, Alejandro Kievsky, Michele Viviani. Embedding nuclear physics inside the unitary-limit window. Phys.Rev.C, 2019, 100 (3), pp.034004. ⟨10.1103/PhysRevC.100.034004⟩. ⟨hal-02088704⟩
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