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Nuclear Theory·nucl-th

Friday·September 16, 2016

9 papers—4 primary·5 cross-listed

All9Primary4Cross-lists5
  1. 01

    [Submitted on 14 Sept 2016]

    Momentum distribution of N in nuclei

    N. G. Kelkar🇨🇴

    Due to its dominance in the low energy eta-nucleon interaction, the S11 N(1535) resonance enters as an important ingredient in the analyses of experiments aimed at finding evidence for the existence of eta-mesic nuclei. The static properties of the resonance get modified inside the nucleus and its momentum distribution is used in deciding these properties as well as the kinematics in the analyses. Here we show that given the possibility for the existence of an N-He quasibound state, the relative momentum distribution of an N and He inside such a He is narrower than that of neutron-He in He. Results for the N-Mg system are also presented. The present exploratory work could be useful in motivating searches of exotic N-nucleus quasibound states as well as in performing analyses of eta meson production data.

    Comments:
    17 pages, 6 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1609.04463 [pdf]
    EPJA(2016)·18 citations
  2. 02

    [Submitted on 15 Sept 2016]

    MESON2016 -- Concluding Remarks

    Avraham Gal🇮🇱

    Several topics presented and discussed at MESON2016 are highlighted, including pentaquarks, dibaryons and meson-nuclear bound states.

    Comments:
    concluding plenary talk given at MESON2016 -- the 14th International Workshop on Meson Production, Properties and Interaction, 2nd-7th June 2016, Kraków, Poland, to appear in the EPJ Web of Conferences, v2 -- references updated
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1609.04570 [pdf]
    EPJ Web Conf.(2016)·10 citations
  3. 03

    [Submitted on 15 Sept 2016]

    Review of the electric dipole moment of light nuclei

    Nodoka Yamanaka🇯🇵

    In this review, we summarize the theoretical development on the electric dipole moment of light nuclei. We first describe the nucleon level CP violation and its parametrization. We then present the results of calculations of the EDM of light nuclei in the ab initio approach and in the cluster model. The analysis of the effect of several models beyond standard model is presented, together with the prospects for its discovery. The advantage of the electric dipole moment of light nuclei is focused in the point of view of the many-body physics. The evaluations of the nuclear electric dipole moment generated by the -term and by the CP phase of the Cabibbo-Kobayashi-Maskawa matrix are also reviewed.

    Comments:
    35 pages, 9 figures. review, published version
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1609.04759 [pdf]
    IJMPE(2017)·59 citations
  4. 04

    [Submitted on 15 Sept 2016]

    Hydrodynamization in kinetic theory: Transient modes and the gradient expansion

    Michal P. Heller🇩🇪 · Aleksi Kurkela🇨🇭 · Michal Spalinski🇵🇱 · Viktor Svensson🇵🇱

    We explore the transition to hydrodynamics in a weakly-coupled model of quark-gluon plasma given by kinetic theory in the relaxation time approximation with conformal symmetry. We demonstrate that the gradient expansion in this model has a vanishing radius of convergence due to the presence of a transient (nonhydrodynamic) mode, in a way similar to results obtained earlier in strongly-coupled gauge theories. This suggests that the mechanism by which hydrodynamic behaviour emerges is the same, which we further corroborate by a novel comparison between solutions of different weakly and strongly coupled models. However, in contrast with other known cases, we find that not all the singularities of the analytic continuation of the Borel transform of the gradient expansion correspond to transient excitations of the microscopic system: some of them reflect analytic properties of the kinetic equation when the proper time is continued to complex values.

    Comments:
    6 pages, 2 figures, v2: author added, major rewrite, mysterious off real axis singularities in the Borel plane explained (!), see also arXiv:1802.08225 [nucl-th] by Heller and Svensson; v3: references added, minor improvements in the text, first 426 terms from Eq. (8) included in the submission; v4: title changed, matches published version
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Fluid Dynamics (physics.flu-dyn)
    arXiv:
    1609.04803 [pdf]
    PRD(2018)·192 citations

Affiliations

first authorsco-authorsvia INSPIRE