PaperPanorama
FAQ

Nuclear Theory·nucl-th

Thursday·January 4, 2018

5 papers—3 primary·2 cross-listed

All5Primary3Cross-lists2
  1. 01

    Towards a relativistic formulation of baryon-baryon interactions in chiral perturbation theory

    Xiu-Lei Ren🇨🇳 · Kai-Wen Li🇨🇳 · Li-Sheng Geng🇨🇳

    In this talk, we report on two recent studies of relativistic nucleon-nucleon and hyperon-nucleon interactions in covariant chiral perturbation theory, where they are constructed up to leading order. The relevant unknown low energy constants are fixed by fitting to the nucleon-nucleon and hyperon-nucleon scattering data. It is shown that these interactions can describe the scattering data with a quality similar to their next-to-leading order non-relativistic counterparts. These studies show that it is technically feasible to construct relativist baryon-baryon interactions, and in addition, after further refinements, these interactions may provide important inputs to {\it ab initio} relativistic nuclear structure and reaction studies and help improve our understanding of low energy strong interactions.

    nucl-thhep-phNucl.Phys.Rev.(2017)·6 citations
  2. 02

    Properties of superheavy isotopes Z=120 and isotones N=184 within the Skyrme-HFB model

    A. Kosior · A. Staszczak · Cheuk-Yin Wong

    We study the nuclear properties of even-even superheavy =120 isotopes and =184 isotones with the Skyrme Hartree-Fock-Bogoliubov (HFB)approach. Within this model we examine the deformation energy surfaces and two paths to fission: a reflection-symmetric path with elongated fission fragments (sEF) and a reflection-asymmetric path corresponding to elongated fission fragments (aEF). Furthermore, we explore the energy surfaces in the region of very large oblate deformations with toroidal nuclear density distributions. While the energy surfaces of toroidal =120 isotopes and =184 isotones do not possess energy minima without angular momenta,local energy minima (toroidal high spin isomeric states) appear for many of these superheavy nuclei with specific angular momenta about the symmetry axis. We have theoretically located the toroidal high spin isomers (THSIs) of Og,, , and .

    nucl-thActa Phys.Polon.Supp.(2018)·2 citations
  3. 03

    Energy Dependent Prompt Neutron Multiplicity Parameterization for Actinide Photofission

    A. I. Lengyel · O. O. Parlag · I. V. Pylypchynec · V. T. Maslyuk · M. I. Romanyuk · O. O. Gritzay

    The prompt neutron averaged number and the dependence of prompt neutron yield on fragment mass {\nu}(A) of photofission of actinide nuclei 235U and 238U in the giant dipole resonance energy range has been parameterized. This allows us to describe the observed changes of saw-tooth behavior of neutron yield from the light and heavy fragments using few energy and nucleon composition dependent free parameters and to predict {\nu}(A) for other actinide isotopes.

    nucl-th0 citations
  4. 04

    In-Medium Electromagnetic Form Factor with a Symmetric Vertex in a Light Front Approach

    George H. S. Yabusaki (Instituto Tecnológico de Aeronáutica - ITA and LFTC - Cruzeiro do Sul)🇧🇷 · J. P. B. C. de Melo (LFTC - Cruzeiro do Sul)🇧🇷 · Wayne de Paula (Instituto Tecnológico de Aeronáutica - ITA)🇧🇷 · K. Tsushima (LFTC - Cruzeiro do Sul)🇧🇷 · T. Frederico (Instituto Tecnológico de Aeronáutica - ITA)🇧🇷

    Using the light-front kaon wave function based on a Bethe-Salpeter amplitude model for the quark-antiquark bound state, we study the Electromagnetic Form Factor (EMFF) of the kaon in nuclear medium within the framework of light-front field theory. The kaon model we adopt is well constrained by previous and recent studies to explain its properties in vacuum. The in-medium kaon EMFF is evaluated for the + component of the electromagnetic current, , in the Breit frame. In order to consistently incorporate the constituent up and antistrange quarks of the kaon immersed in symmetric nuclear matter, we use the Quark-Meson Coupling (QMC) model, which has been widely applied to various hadronic and nuclear phenomena in a nuclear medium with success. We predict the in-medium modification of the kaon EMFF in symmetric nuclear matter. It is found that, after a fine tuning of the regulator mass, i.e. GeV, the model is suitable to fit the available experimental data in vaccum within the theoretical uncertainties, and based on this we predict the in-medium modification of the EMFF.

    ↳ hep-phhep-exnucl-exnucl-thFew Body Syst.(2018)·7 citations
  5. 05

    Parton self-energies for general momentum-space anisotropy

    Babak S. Kasmaei🇺🇸 · Michael Strickland🇺🇸

    We introduce an efficient general method for calculating the self-energies, collective modes, and dispersion relations of quarks and gluons in a momentum-anisotropic high-temperature quark-gluon plasma. The method introduced is applicable to the most general classes of deformed anisotropic momentum distributions and the resulting self-energies are expressed in terms of a series of hypergeometric basis functions which are valid in the entire complex phase-velocity plane. Comparing to direct numerical integration of the self-energies, the proposed method is orders of magnitude faster and provides results with similar or better accuracy. To extend previous studies and demonstrate the application of the proposed method, we present numerical results for the parton self-energies and dispersion relations of partonic collective excitations for the case of an ellipsoidal momentum-space anisotropy. Finally, we also present, for the first time, the gluon unstable mode growth rate for the case of an ellipsoidal momentum-space anisotropy.

    ↳ hep-phnucl-thPRD(2018)·16 citations

Affiliations

first authorsco-authorsvia INSPIRE