PaperPanorama
FAQ

Nuclear Theory·nucl-th

Thursday·February 22, 2018

3 papers—1 primary·2 cross-listed

All3Primary1Cross-lists2
  1. 01

    [Submitted on 21 Feb 2018]

    Nucleon radius effects on neutron stars in quark mean field model

    Zhen-Yu Zhu🇨🇳 · Ang Li🇨🇳

    We study the effects of free space nucleon radius on nuclear matter and neutron stars within the framework of quark mean field model. The nucleon radius is treated self-consistently with this model, where quark confinement is adjusted to fit different values of nucleon radius. Corrections due to center-of-mass motion, quark-pion coupling, and one gluon exchange are included to obtain the nucleon mass in vacuum. The meson coupling constants that describe the behavior of many-body nucleonic system are newly-constructed by reproducing the empirical saturation properties of nuclear matter, including the recent determinations of symmetry energy parameters. Our results show that the nucleon radius in free space have negligible effects on nuclear matter equation of state and neutron star mass-radius relations, which is different from the conclusion drawn in previous studies. We further explore that the sensitivity of star radius on the nucleon radius found in earlier publications is actually from the symmetry energy and its slope.

    Comments:
    6 pages, 4 figures, 2 tables, Phys. Rev. C (2018) accepted
    Subjects:
    Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR)
    arXiv:
    1802.07441 [pdf]
    PRC(2018)·21 citations
  2. 02

    [Submitted on 20 Feb 2018] (cross-list from hep-th)

    Self-Dual Skyrmions on the Spheres

    Y. Amari🇯🇵 · L. A. Ferreira🇧🇷

    We construct self-dual sectors for scalar field theories on a -dimensional Minkowski space-time with target space being the -dimensional sphere . The construction of such self-dual sectors is made possible by the introduction of an extra functional on the action that renders the static energy and the self-duality equations conformally invariant on the -dimensional spatial submanifold. The conformal and target space symmetries are used to build an ansatz that leads to an infinite number of exact self-dual solutions with arbitrary values of the topological charge. The five dimensional case is discussed in detail where it is shown that two types of theories admit self dual sectors. Our work generalizes the known results in the three-dimensional case that leads to an infinite set of self-dual Skyrmion solutions.

    Comments:
    23 pages, 2 figures
    Subjects:
    High Energy Physics — Theory (hep-th); Mathematical Physics (math-ph); math.MP (math.MP); nlin.SI (nlin.SI); Nuclear Theory (nucl-th)
    arXiv:
    1802.07271 [pdf]
    PRD(2018)·2 citations
  3. 03

    [Submitted on 21 Feb 2018] (cross-list from hep-ph)

    Neutrino astrophysics and its connections to nuclear physics

    Maria Cristina Volpe🇫🇷

    We highlight recent developments in neutrino astrophysics. We discuss some of the connections with nuclear physics.

    Comments:
    7 pages, 1 figure, Proceedings of the "Conference on Neutrino and Nuclear Physics (CNNP2017), 15-21 October, Catania
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1802.07478 [pdf]
    J.Phys.Conf.Ser.(2018)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE