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Nuclear Theory·nucl-th

Friday·June 8, 2018

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 01

    Correlations imposed by the unitary limit between few-nucleon systems, nuclear matter and neutron stars

    A. Kievsky · M. Viviani · D. Logoteta · I. Bombaci · L. Girlanda

    The large values of the singlet and triplet two-nucleon scattering lengths locate the nuclear system close to the unitary limit. This particular position strongly constrains the low-energy observables in the three-nucleon system as depending on one parameter, the triton binding energy, and introduces correlations in the low energy sector of light nuclei. Here we analyze the propagation of these correlations to infinite nuclear matter showing that its saturation properties, the equation of state of -stable nuclear matter and several properties of neutron stars, as their maximum mass, are well determined solely by a few number of low-energy quantities of the two- and three-nucleon systems. In this way we make a direct link between the universal behavior observed in the low-energy region of few-nucleon systems and fundamental properties of nuclear matter and neutron stars.

    nucl-thPRL(2018)·55 citations
  2. 02

    Dissecting reaction calculations using Halo EFT and ab initio input

    P. Capel · D. R. Phillips · H.-W. Hammer

    We present a description of the break-up of halo nuclei in peripheral nuclear reactions by coupling a model of the projectile motivated by Halo Effective Field Theory with a fully dynamical treatment of the reaction using the Dynamical Eikonal Approximation. Our description of the halo system reproduces its long-range properties, i.e., binding energy and asymptotic normalization coefficients of bound states and phase shifts of continuum states. As an application we consider the break-up of 11Be in collisions on Pb and C targets. Taking the input for our Halo-EFT-inspired description of 11Be from a recent ab initio calculation of that system yields a good description of the Coulomb-dominated breakup on Pb at energies up to about 2 MeV, with the result essentially independent of the short-distance part of the halo wave function. However, the nuclear dominated break-up on C is more sensitive to short-range physics. The role of spectroscopic factors and possible extensions of our approach to include additional short-range mechanisms are also discussed.

    nucl-thPRC(2018)·41 citations
  3. 03

    Combined few-body and mean-field model for nuclei

    D. Hove🇩🇰 · E. Garrido🇪🇸 · P. Sarriguren🇪🇸 · D.V. Fedorov🇩🇰 · H.O.U. Fynbo🇩🇰 · A.S. Jensen🇩🇰 · N.T. Zinner🇩🇰

    The challenging nuclear many-body problem is discussed along with classifications and qualitative descriptions of existing methods and models. We present detailed derivations of a new method where cluster correlations co-exist with an underlying mean-field described core-structure. The variation of an antisymmetrized product of cluster and core wave functions and a given nuclear interaction, provide sets of self-consistent equations of motion. After the applications on dripline nuclei we discuss perspectives with improvements and applications. In the conclusion we summarize while emphasizing the merits of consistently treating both short- and large-distance properties, few- and many-body correlations, ordinary nuclear structure, and concepts of halos and Efimov states.

    nucl-thJ.Phys.G(2018)·6 citations

Affiliations

first authorsco-authorsvia INSPIRE