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Nuclear Theory·nucl-th

Friday·October 4, 2019

9 papers—4 primary·5 cross-listed

All9Primary4Cross-lists5
  1. 01

    [Submitted on 2 Oct 2019]

    A model for neutrino-nucleus interactions in the GeV region

    Maria B. Barbaro🇮🇹

    We review the recent progress in modelling neutrino-nucleus scattering, in a framework based on scaling which describes simultaneously the nuclear response to electromagnetic and weak probes. The study is relevant for the analysis of neutrino oscillation data and the design of the next generation experiments Hyper-Kamiokande and DUNE.

    Comments:
    4 pages, 3 figures, contribution to the proceedings of the 27th International Nuclear Physics Conference (INPC) 2019, July 29- August 2, Glasgow, UK
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1910.01144 [pdf]
    J.Phys.Conf.Ser.(2020)·0 citations
  2. 02

    [Submitted on 3 Oct 2019]

    Vorticity and Particle Polarization in Relativistic Heavy-Ion Collisions

    Yu. B. Ivanov🇷🇺 · V. D. Toneev🇷🇺 · A. A. Soldatov🇷🇺

    We review studies of vortical motion and the resulting global polarization of and hyperons in heavy-ion collisions, in particular, within 3FD model. 3FD predictions for the global midrapidity polarization in the FAIR-NICA energy range are presented. The 3FD simulations indicate that energy dependence of the observed global polarization of hyperons in the midrapidity region is a consequence of the decrease of the vorticity in the central region with the collision energy rise because of pushing out the vorticity field into the fragmentation regions. At high collision energies this pushing-out results in a peculiar vortical structure consisting of two vortex rings: one ring in the target fragmentation region and another one in the projectile fragmentation region with matter rotation being opposite in these two rings.

    Comments:
    8 pages, 6 figures, Contribution to proceedings of International Workshop "Infinite and Finite Nuclear Matter" (INFINUM), March 20-22, 2019, JINR BLTP, Dubna
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1910.01332 [pdf]
    Phys.Atom.Nucl.(2020)·33 citations
  3. 03

    [Submitted on 3 Oct 2019]

    Single- and two-nucleon antikaon absorption in nuclear matter with chiral meson-baryon interactions

    J. Hrtánková🇨🇿 · À. Ramos🇪🇸

    We developed a microscopic model for antikaon absorption on two nucleons in nuclear matter. The absorption is described within a meson-exchange picture and the primary interaction strength is derived from state-of-the-art chiral coupled channel meson-baryon interaction models. We took into account the medium modification of the scattering amplitudes due to the Pauli correlations. We derived the as well as optical potentials as functions of nuclear matter density including the real part of the potential. We calculated the single- and two-nucleon absorption fractions and branching ratios for various mesonic and non-mesonic channels. We confirmed the crucial role of in-medium effects in our calculations. Our results are in very good agreement with available experimental data from old bubble chamber experiments as well as with the latest results from the AMADEUS collaboration.

    Comments:
    manuscript accepted by Phys. Rev. C
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1910.01336 [pdf]
    PRC(2020)·17 citations
  4. 04

    [Submitted on 3 Oct 2019]

    Roy Glauber and Asymptotic Diffraction Theory

    Per Osland🇳🇴

    This is a review of Glauber's asymptotic diffraction theory, in which diffractive scattering is described in terms of interference between semiclassical amplitudes, resulting from a stationary-phase approximation. Typically two such amplitudes are sufficient to accurately describe elastic scattering, but the stationary points are located at complex values of the impact parameter. Their separation controls the interference pattern, and their offsets from the real axis determine the overall fall-off with momentum transfer. Asymptotically, at large momentum transfers, the stationary points move towards singularities of the profile function. I also include some reminiscences from our collaboration.

    Comments:
    12 pages, contribution to SciPost Physics Proceedings: EFB 24. v2: minor changes
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1910.01408 [pdf]
    SciPost Phys.Proc.(2020)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE