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Nuclear Theory·nucl-th

Monday·July 2, 2018

7 papers—5 primary·2 cross-listed

All7Primary5Cross-lists2
  1. 01

    [Submitted on 28 Jun 2018]

    Pion Mass Modification in presence of external magnetic field

    S. P. Adhya🇮🇳 · M. Mandal🇮🇳 · S. Biswas🇮🇳 · P. K. Roy🇮🇳

    In this work, the self energies of and up to one loop order have been calculated in the limit of weak external magnetic field. The effective masses are explicitly dependent on the magnetic field which are modified significantly for the pseudoscalar coupling due to weak field approximation of the external field. On the other hand, for the pseudovector coupling, there is a modest increment in the effective masses of the pions. These theoretical developments are relevant for the study of the phenomenological aspect of mesons in the context of neutron stars as well as heavy ion collisions.

    Comments:
    Published in conference proceedings of DAE-HEP-2016 (XXII DAE High Energy Physics Symposium, New Delhi, India)
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1806.11199 [pdf]
    Springer Proc.Phys.(2018)·0 citations
  2. 02

    [Submitted on 29 Jun 2018]

    Novel approach to excitation spectrum from correlated ground state

    Takaharu Otsuka🇯🇵 · Tomoaki Togashi🇯🇵 · Noritaka Shimizu🇯🇵 · Yutaka Utsuno🇯🇵 · Toshio Suzuki🇯🇵

    A novel approach to obtain the excitation spectrum of nuclei is presented as well as its proof-of-principle. The Monte Carlo Shell Model is extended so that the excitation spectrum can be calculated from its ground state with full of correlations. This new methodology is sketched with the example of E1 excitations from the nucleus 88Sr in comparison to experiment. From the B(E1; 0+1 -> 1- ) value, the photoabsorption cross section is calculated, with the Giant Dipole and Pygmy Dipole Resonances in agreement with experiment. Applications to 90Sr and 90,93Zr are shown with similar characteristics. The possible relevance to the transmutation of long-lived fission products is discussed

    Comments:
    4 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1806.11262 [pdf]
    1 citation
  3. 03

    [Submitted on 29 Jun 2018]

    Quantitative analysis of tensor effects in the relativistic Hartree-Fock theory

    Zhiheng Wang🇨🇳 · Qiang Zhao🇨🇳 · Haozhao Liang🇯🇵 · Wen Hui Long🇨🇳

    Tensor force is identified in each meson-nucleon coupling in the relativistic Hartree-Fock theory. It is found that all the meson-nucleon couplings, except the -scalar one, give rise to the tensor force. The effects of tensor force on various nuclear properties can now be investigated quantitatively, which allows fair and direct comparisons with the corresponding results in the non-relativistic framework. The tensor effects on nuclear binding energies and the evolutions of the , and magic gaps are studied. The tensor contributions to the binding energies are shown to be tiny in general. The and gaps are sensitive to the tensor force, but the gaps are not.

    Comments:
    21 pages, 9 figures, 6 tables
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1806.11270 [pdf]
    PRC(2018)·34 citations
  4. 04

    [Submitted on 29 Jun 2018]

    A new and finite family of solutions of hydrodynamics: Part II: Advanced estimate of initial energy densities

    Gábor Kasza🇭🇺 · Tamás Csörgő🇭🇺

    We derive a new, exact formula for the estimate of the initial energy densities from a new family of finite and exact solution of relativistic perfect fluid hydrodynamics. The new formula depends non-trivially on the speed of sound and on the shape or width parameter of the measured (pseudo)rapidity distribution.

    Comments:
    Invited talk of G. Kasza at the WPCF 2018 conference in Cracow, Poland, May 22-26, 2018. Submitted to Acta Physica Polonica B
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1806.11309 [pdf]
    Acta Phys. Pol. B Proc. Suppl. vol. 12 (2…·5 citations
  5. 05

    [Submitted on 29 Jun 2018]

    Half lives of proton emitters with KDE0v1 Skyrme interaction

    K. Madhuri🇮🇳 · D. N. Basu🇮🇳 · T. R. Routray🇮🇳 · S. P. Pattnaik🇮🇳

    The half-lives of proton radioactivity of proton emitters are investigated theoretically by using KDE0v1 Skyrme interaction. The total barrier potential in the proton radioactive nuclei is calculated as the sum of the nuclear, Coulomb and centrifugal contributions. The Hartree-Fock nuclear density distributions is used in calculating the nuclear as well as the Coulomb interaction potentials. The quantum mechanical tunneling probability is calculated within the WKB approximation. These calculations provide reasonable estimates for the observed proton radioactivity lifetimes.

    Comments:
    11 pages, 1 figure
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1806.11334 [pdf]
    Indian J.Phys.(2021)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE