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Nuclear Theory·nucl-th

Friday·January 31, 2020

8 papers—3 primary·5 cross-listed

All8Primary3Cross-lists5
  1. 04

    [Submitted on 29 Jan 2020] (cross-list from astro-ph.HE)

    Role of the crust on the tidal deformability of a neutron star within a unified treatment of dense matter

    Loïc Perot🇧🇪 · Nicolas Chamel🇧🇪 · Aurélien Sourie🇧🇪

    The role of the crust on the tidal deformability of a cold nonaccreted neutron star is studied using the recent unified equation of state BSk24. This equation of state, which is based on the nuclear-energy density functional theory, provides a thermodynamically consistent description of all stellar regions. Results obtained with this equation of state are compared to those calculated for a putative neutron star made entirely of homogeneous matter. The presence of the crustal layers is thus found to significantly reduce the Love number , especially for low-mass stars. However, this reduction mainly arises from the increase in the stellar radius almost independently of the equation of state. This allows for a simple analytic estimate of for realistic neutron stars using the equation of state of homogeneous matter only.

    Comments:
    23 pages, 12 figures
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); Nuclear Theory (nucl-th)
    arXiv:
    2001.11068 [pdf]
    PRC(2020)·31 citations
  2. 05

    [Submitted on 29 Jan 2020] (cross-list from hep-ph)

    Electromagnetic radiation from the pre-equilibrium/pre-hydro stage of the quark-gluon plasma

    Jessica Churchill🇨🇦 · Li Yan🇨🇳 · Sangyong Jeon🇨🇦 · Charles Gale🇨🇦

    Photons produced in the pre-equilibrium/pre-hydro stage of the quark-gluon plasma produced in relativistic heavy-ion collisions were computed using parton distribution functions obtained from solutions of the Boltzmann equation. The effect of the initial gluon momentum anisotropy and the dependence on the saturation momentum was investigated. We see that small results in a photon yield enhancement, whereas a larger results in a pre-equilibrium photon suppression, owing to the strict constraint of matching to experimental energy density.

    Comments:
    4 pages, 2 figures, presented at Quark Matter 2019
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2001.11110 [pdf]
    NPA(2021)·8 citations
  3. 06

    [Submitted on 30 Jan 2020] (cross-list from hep-th)

    Computing real time correlation functions on a hybrid classical/quantum computer

    Niklas Mueller🇺🇸 · Andrey Tarasov🇺🇸 · Raju Venugopalan🇺🇸

    Quantum devices may overcome limitations of classical computers in studies of nuclear structure functions and parton Wigner distributions of protons and nuclei. In this talk, we discuss a worldline approach to compute nuclear structure functions in the high energy Regge limit of QCD using a hybrid quantum computer, by expressing the fermion determinant in the QCD path integral as a quantum mechanical path integral over -dimensional fermionic and bosonic world-lines in background gauge fields. Our simplest example of computing the well-known dipole model result for the structure function in the high energy Regge limit is feasible with NISQ era technology using few qubits and shallow circuits. This example can be scaled up in complexity and extended in scope to compute structure functions, scattering amplitudes and other real-time correlation functions in QCD, relevant for example to describe non-equilibrium transport of quarks and gluons in a Quark-Gluon-Plasma.

    Comments:
    Conference Proceedings XXVIIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2019), 4 pages, no figures
    Subjects:
    High Energy Physics — Theory (hep-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
    arXiv:
    2001.11145 [pdf]
    NPA(2021)·10 citations
  4. 07

    [Submitted on 30 Jan 2020] (cross-list from astro-ph.SR)

    Astronuclear Physics: a Tale of the Atomic Nuclei in the Skies

    M. Arnould · S. Goriely

    A century ago, nuclear physics entered astrophysics, giving birth to a new field of science referred to as "Nuclear Astrophysics". With time, it developed at an impressive pace into a vastly inter- and multidisciplinary discipline bringing into its wake not only astronomy and cosmology, but also many other sub-fields of physics, especially particle, solid-state and computational physics, as well as chemistry, geology and even biology. The present Astronuclear Physics review focusses primarily on the facets of nuclear physics that are of relevance to astronomy and astrophysics, the theoretical aspects being of special concern here.

    Comments:
    100 pages, 24 figures, accepted for publication in the "Progress in Particle and Nuclear Physics" Journal
    Subjects:
    Solar and Stellar Astrophysics (astro-ph.SR); Nuclear Theory (nucl-th)
    arXiv:
    2001.11228 [pdf]
    PPNP(2020)·115 citations
  5. 08

    [Submitted on 30 Jan 2020] (cross-list from hep-ph)

    Electromagnetic and weak probes: theory

    Ralf-Arno Tripolt🇩🇪

    An overview of the latest theoretical developments and results on electromagnetic and weak probes in relativistic heavy-ion collisions is presented. The possibilities to use electromagnetic probes, i.e., photons and dileptons, as a spectrometer, thermometer, chronometer, polarimeter, barometer, and multimeter of the collision system, as well as to explore the QCD phase diagram and to locate phase transitions such as the critical endpoint, are discussed.

    Comments:
    Invited Plenary Talk given at Quark Matter 2019, to be published in Nuclear Physics A
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2001.11232 [pdf]
    NPA(2021)·10 citations

Affiliations

first authorsco-authorsvia INSPIRE