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Nuclear Theory·nucl-th

Tuesday·February 2, 2016

16 papers—10 primary·6 cross-listed

All16Primary10Cross-lists6
  1. 11

    Kondo effect in charm/bottom nuclei

    Shigehiro Yasui🇯🇵

    We discuss the Kondo effect for isospin-exchange interaction between a , meson and a valence nucleon in charm/bottom atomic nuclei including the discrete energy-levels for valence nucleons. To investigate the binding energy by the Kondo effect, we introduce the mean-field approach for the bound state of the , meson in charm/bottom nuclei. Assuming a simple model, we examine the validity of the mean-field approximation by comparing the results with the exact solutions. We also estimate the effect of the quantum fluctuation beyond the mean-field approximation. We discuss the competition between the Kondo effect and the other correlations in valence nucleon, the isospin symmetry breaking and the nucleon pairings.

    ↳ hep-phnucl-thPRC(2016)·30 citations
  2. 12

    Generalized Valon Model for Double Parton Distributions

    Wojciech Broniowski🇵🇱 · Enrique Ruiz Arriola🇪🇸 · Krzysztof Golec-Biernat🇵🇱

    We show how the double parton distributions may be obtained consistently from the many-body light-cone wave functions. We illustrate the method on the example of the pion with two Fock components. The procedure, by construction, satisfies the Gaunt-Stirling sum rules. The resulting single parton distributions of valence quarks and gluons are consistent with a phenomenological parametrization at a low scale.

    ↳ hep-phnucl-thFew Body Syst.(2016)·35 citations
  3. 13

    Proton-Proton On Shell Optical Potential at High Energies and the Hollownes Effect

    Enrique Ruiz Arriola🇪🇸 · Wojciech Broniowski🇵🇱

    We analyze the usefulness of the optical potential as suggested by the double spectral Mandelstam representation at very high energies, such as in the proton-proton scattering at ISR and the LHC. Its particular meaning regarding the interpretation of the scattering data up to the maximum available measured energies is discussed. Our analysis reconstructs 3D dynamics from the effective transverse 2D impact parameter representation and suggests that besides the onset of gray nucleons at the LHC there appears an inelasticity depletion (hollowness) which precludes convolution models at the attometer scale.

    ↳ hep-phnucl-thFew Body Syst.(2016)·22 citations
  4. 14

    IR-improved Soft-wall AdS/QCD Model for Baryons

    Zhen Fang🇨🇳 · Dan-Ning Li🇨🇳 · Yue-Liang Wu🇨🇳

    We construct an infrared-improved soft-wall AdS/QCD model for baryons by considering the infrared-modified 5D conformal mass and Yukawa coupling of the bulk baryon field. The model is also built by taking into account the parity-doublet pattern for the excited baryons. When taking the bulk vacuum structure of the meson field to be the one obtained consistently in the infrared-improved soft-wall AdS/QCD model for mesons, we arrive at a consistent prediction for the baryon mass spectrum in even and odd parity. The prediction shows a remarkable agreement with the experimental data. We also perform a calculation for the meson-nucleon coupling constant and obtain a consistent result in comparison with the experimental data and many other models.

    ↳ hep-phnucl-thPLB(2016)·28 citations
  5. 15

    Tests of Lorentz and CPT symmetry with hadrons and nuclei

    J. P. Noordmans🇵🇹 · J. de Vries🇳🇱 · R. G. E. Timmermans🇳🇱

    We explore the breaking of Lorentz and CPT invariance in strong interactions at low energy in the framework of chiral perturbation theory. Starting from the set of Lorentz-violating operators of mass-dimension five with quark and gluon fields, we construct the effective chiral Lagrangian with hadronic and electromagnetic interactions induced by these operators. We develop the power-counting scheme and discuss loop diagrams and the one-pion-exchange nucleon-nucleon potential. The effective chiral Lagrangian is the basis for calculations of low-energy observables with hadronic degrees of freedom. As examples, we consider clock-comparison experiments with nuclei and spin-precession experiments with nucleons in storage rings. We derive strict limits on the dimension-five tensors that quantify Lorentz and CPT violation.

    ↳ hep-phnucl-thPRC(2016)·26 citations
  6. 16

    Kinetic theory of a longitudinally expanding system

    Francois Gelis🇫🇷

    We use kinetic theory in order to study the role of quantum fluctuations in the isotropization of the pressure tensor in a system subject to fast longitudinal expansion, such as the matter produced in the early stages of a heavy ion collision.

    ↳ hep-phnucl-thEPJ Web Conf.(2016)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE