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Nuclear Theory·nucl-th

Wednesday·November 9, 2016

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 01

    Calculation of three-body nuclear reactions with angular-momentum and parity-dependent optical potentials

    A. Deltuva · D. Jurčiukonis

    Angular-momentum or parity-dependent nonlocal optical potentials for nucleon- scattering able to fit differential cross section data over the whole angular regime are developed and applied to the description of deuteron- scattering in the framework of three-body Faddeev-type equations for transition operators. Differential cross sections and deuteron analyzing powers for elastic scattering and transfer reactions are calculated using a number of local and nonlocal optical potentials and compared with experimental data. Angular-momentum or parity-dependence of the optical potential turns out to be quite irrelevant in the considered three-body reactions while nonlocality is essential for a successful description of the differential cross section data, especially in transfer reactions.

    nucl-thnucl-exPRC(2016)·3 citations
  2. 02

    The falsification of Chiral Nuclear Forces

    E. Ruiz Arriola🇪🇸 · J. E. Amaro🇪🇸 · R. Navarro Perez🇺🇸

    Predictive power in theoretical nuclear physics has been a major concern in the study of nuclear structure and reactions. The Effective Field Theory (EFT) based on chiral expansions provides a model independent hierarchy for many body forces at long distances but their predictive power may be undermined by the regularization scheme de- pendence induced by the counterterms and encoding the short distances dynamics which seem to dominate the uncertainties. We analyze several examples including zero energy NN scattering or perturbative counterterm-free peripheral scattering where one would ex- pect these methods to work best and unveil relevant systematic discrepancies when a fair comparison to the Granada-2013 NN-database and partial wave analysis is undertaken.

    nucl-thhep-phEPJ Web Conf.(2017)·8 citations
  3. 03

    Spin polarization and color superconductivity in the Nambu--Jona-Lasinio model at finite temperature

    Hiroaki Matsuoka (Kochi Univ., Japan)🇯🇵 · Yasuhiko Tsue (Kochi Univ., Japan)🇯🇵 · Joao da Providencia (Univ. de Coimbra, Portugal)🇵🇹 · Constancia Providencia (Univ. de Coimbra, Portugal)🇵🇹 · Masatoshi Yamamura (Kansai Univ., Japan)🇯🇵

    We investigate the possible existence of spin polarization and color superconductivity in the Nambu--Jona-Lasinio model with a tensor-type interaction at finite density and temperature. The thermodynamic potential is calculated by the functional integral method. Numerical results indicate that at low temperature and quark chemical potential the chiral condensed phase exists, and at intermediate chemical potential the color superconducting phase appears. In addition, depending on the magnitude of the tensor coupling, at large chemical potential and low temperature, a color superconducting phase and a spin polarized phase may coexist while at intermediate temperatures only the spin polarized phase occurs.

    ↳ hep-phnucl-thPRD(2017)·11 citations
  4. 04

    Confinement, Holonomy and Correlated Instanton-Dyon Ensemble I: SU(2) Yang-Mills Theory

    Miguel Angel Lopez-Ruiz🇺🇸 · Yin Jiang🇺🇸 · Jinfeng Liao🇺🇸

    The mechanism of confinement in Yang-Mills theories remains a challenge to our understanding of nonperturbative gauge dynamics. While it is widely perceived that confinement may arise from chromo-magnetically charged gauge configurations with nontrivial topology, it is not clear what types of configurations could do that and how, in pure Yang-Mills and QCD-like (non-supersymmetric) theories. Recently a promising approach has emerged, based on statistical ensembles of dyons/anti-dyons that are constituents of instanton/anti-instanton solutions with nontrivial holonomy where the holonomy plays a vital role as an effective "Higgsing" mechanism. We report a thorough numerical investigation of the confinement dynamics in SU(2) Yang-Mills theory by constructing such a statistical ensemble of correlated instanton-dyons.

    ↳ hep-phnucl-thPRD(2018)·15 citations

Affiliations

first authorsco-authorsvia INSPIRE