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Nuclear Theory·nucl-th

Monday·December 31, 2018

14 papers—4 primary·10 cross-listed

All14Primary4Cross-lists10
  1. 01

    [Submitted on 26 Dec 2018]

    Consistent relativistic mean field models constrained by GW170817

    Odilon Lourenço🇧🇷 · Mariana Dutra🇧🇷 · César H. Lenzi🇧🇷 · César V. Flores🇧🇷 · Débora P. Menezes🇧🇷

    We have obtained the Love number and corresponding tidal deformabilites () associated with the relativistic mean-field parametrizations shown to be consistent (CRMF) with the nuclear matter, pure neutron matter, symmetry energy and its derivatives [Dutra, et al., Phys. Rev. C 90, 055203 (2014)]. Our results show that CRMF models present very good agreement with the recent data from binary neutron star merger event GW170817. They also confirm the strong correlation between and the radius of canonical stars (). When a recently GW170817 constraint on and the corresponding radius is used, the majority of the models tested are shown to satisfy it.

    Comments:
    5 pages, 3 figures and 1 table. Version accepted for publication in Physical Review C
    Subjects:
    Nuclear Theory (nucl-th); Solar and Stellar Astrophysics (astro-ph.SR)
    arXiv:
    1812.10533 [pdf]
    PRC(2019)·77 citations
  2. 02

    [Submitted on 27 Dec 2018]

    On the cancellation of radiative corrections to the cross section of electron-proton scattering

    V.S. Fadin🇷🇺 · R.E. Gerasimov🇷🇺

    The largest radiative corrections to the cross section of electron-proton scattering at high energies are associated with emission of photons, real and virtual, by electron. They contain large logarithms coming from soft and collinear photons. Cancellation of the contributions of the soft photons to virtual and real corrections is well known. Less known is the fact that the contributions of the photons collinear to scattered electrons are also cancelled for the most of experiments. On the contrary, contributions of the photons collinear to initial electrons as a rule are not cancelled. It is shown, however, that these contributions are cancelled for the experimental set up suggested by A.A. Vorobev for measurement of proton radius.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1812.10710 [pdf]
    PLB(2019)·7 citations
  3. 03

    [Submitted on 28 Dec 2018]

    Essential elements for nuclear binding

    Bing-Nan Lu🇺🇸 · Ning Li🇺🇸 · Serdar Elhatisari🇩🇪 · Dean Lee🇺🇸 · Evgeny Epelbaum🇩🇪 · Ulf-G. Meißner🇩🇪

    How does nuclear binding emerge from first principles? Our current best understanding of nuclear forces is based on a systematic low-energy expansion called chiral effective field theory. However, recent {\it ab initio} calculations of nuclear structure have found that not all chiral effective field theory interactions give accurate predictions with increasing nuclear density. In this letter we address the reason for this problem and the first steps toward a solution. Using nuclear lattice simulations, we deduce the minimal nuclear interaction that can reproduce the ground state properties of light nuclei, medium-mass nuclei, and neutron matter simultaneously with no more than a few percent error in the energies and charge radii. We find that only four parameters are needed. With these four parameters one can accurately describe neutron matter up to saturation density and the ground state properties of nuclei up to calcium. Given the absence of sign oscillations in these lattice Monte Carlo simulations and the mild scaling of computational effort scaling with nucleon number, this work provides a pathway to high-quality simulations in the future with as many as one or two hundred nucleons.

    Comments:
    Version accepted for publication in Physics Letters B. For better readability, the main section and the supplementary material are merged
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Lattice (hep-lat)
    arXiv:
    1812.10928 [pdf]
    PLB(2019)·128 citations
  4. 04

    [Submitted on 28 Dec 2018]

    On the Neutron Transition Magnetic Moment

    Zurab Berezhiani🇮🇹 · Riccardo Biondi🇮🇹 · Yuri Kamyshkov🇺🇸 · Louis Varriano🇺🇸

    We discuss the possibility of the transition magnetic moments (TMM) between the neutron n and mirror neutron n', its hypothetical sterile twin from parallel particle "mirror" sector. The neutron can be spontaneously converted into mirror neutron via these TMM's (in addition to the more conventional transition channel due to n-n' mass mixing) interacting with the magnetic field B as well as with mirror magnetic field B'. We derive analytic formula for the average probability of n-n' oscillation and consider possible manifestations of the neutron TMM effects. In particular, we discuss potential role of these effects in the neutron lifetime measurement experiments leading us to new, testable predictions.

    Comments:
    24 pages, 2 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1812.11141 [pdf]
    MDPI Physics(2019)·23 citations

Affiliations

first authorsco-authorsvia INSPIRE