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Nuclear Theory·nucl-th

Friday·January 27, 2023

6 papers—1 primary·5 cross-listed

All6Primary1Cross-lists5
  1. 02

    [Submitted on 24 Jan 2023] (cross-list from hep-ph)

    Effect of mesonic off-shell correlations in the PNJL equation of state

    Konstantin Maslov🇨🇿 · David Blaschke🇵🇱

    We study the meson contribution to the equation of state of the 2-flavor PNJL model, including the full momentum dependence of the meson polarization loops. Within the Beth-Uhlenbeck approach, we demonstrate that the contribution from the quark-antiquark continuum excitations in the spacelike region , i.e. the Landau damping, leads to an increase of the pressure for temperatures and a significant meson momentum cut-off dependence in the mesonic pressure and the QCD trace anomaly. We investigate the dependence of the results on the choice of the Polyakov-loop potential parameter . From the dependence of the mesonic pressure on the current quark mass, by means of the Feynman-Hellmann theorem, we evaluate the contribution of the pion quasiparticle gas and Landau damping to the chiral condensate.

    Comments:
    13 pages, 8 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2301.09882 [pdf]
    PRD(2023)·11 citations
  2. 03

    [Submitted on 25 Jan 2023] (cross-list from astro-ph.HE)

    Roles of fast neutrino-flavor conversion on the neutrino-heating mechanism of core-collapse supernova

    Hiroki Nagakura🇯🇵

    One of the greatest uncertainties in any modeling of inner engine of core-collapse supernova (CCSN) is neutrino flavor conversions driven by neutrino self-interactions. We carry out large-scale numerical simulations of multi-energy, multi-angle, three-flavor framework, and general relativistic quantum kinetic neutrino transport in spherical symmetry with an essential set of neutrino-matter interactions under a realistic fluid profile of CCSN. Our result suggests that the neutrino heating in the gain region is reduced by due to fast neutrino-flavor conversion (FFC). We also find that the total luminosity of neutrinos is enhanced by , for which the substantial increase of heavy-leptonic neutrinos by FFCs are mainly responsible. This study provides evidence that FFC has a significant impact on the delayed neutrino-heating mechanism.

    Comments:
    Accepted to PRL
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2301.10785 [pdf]
    PRL(2023)·97 citations
  3. 04

    [Submitted on 25 Jan 2023] (cross-list from quant-ph)

    Demonstrating quantum computing with the quark model

    R. M. Woloshyn🇨🇦

    The use of quantum computing to solve a problem in quantum mechanics is illustrated, step by step, by calculating energies and transition amplitudes in a nonrelativistic quark model. The quantum computations feature the use of variational quantum imaginary time evolution implemented using automatic differentiation to determine ground and excited states of charmonium. The calculation of transition amplitudes is illustrated utilizing the Hadamard test. Examples of readout and gate error mitigation are included.

    Comments:
    23 pages, typo corrected
    Subjects:
    Quantum Physics (quant-ph); High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2301.10828 [pdf]
    0 citations
  4. 05

    [Submitted on 26 Jan 2023] (cross-list from astro-ph.HE)

    Relativistic hybrid stars with sequential first-order phase transitions in light of multimessenger constraints

    Jia Jie Li (SWU, Chongqing)🇨🇳 · Armen Sedrakian (FIAS, Frankfurt and Wroclaw U.)🇩🇪 · Mark Alford (Washington U., St. Louis)🇺🇸

    In this work, we consider the properties of compact stars in which quark matter has low- and high-density phases that are separated by a first-order phase transition. Thus, unlike the commonly considered case of a single phase transition from hadronic to quark matter, our models of hybrid stars contain sequential phase transitions from hadronic matter to low- and then to high-density quark matter phases. We extend our previous study of the parameter space of hybrid stars with a single phase transition to those with sequential phase transitions, taking into account the constraints on the mass and radius of neutron stars from the NICER experiment, the experimental inferences of the neutron skin thickness of the lead nucleus by the PREX-II experiment, and constraints on the tidal deformability from the gravitational-wave event GW170817. We determine the range of the masses for which both twin and triplet configurations, i.e., identical-mass stars with two and three different values of radii, arise.

    Comments:
    v2: matches published version, 11 pages, 11 figures
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2301.10940 [pdf]
    ApJ(2023)·26 citations
  5. 06

    [Submitted on 26 Jan 2023] (cross-list from physics.atom-ph)

    King-plot analysis of isotope shifts in simple diatomic molecules

    Michail Athanasakis-Kaklamanakis🇨🇭 · Shane G. Wilkins🇺🇸 · Alexander A. Breier🇩🇪 · Gerda Neyens🇧🇪

    We demonstrate that the isotope shift in isotopomers of diatomic molecules, where the nucleus of one of its constituent atoms is replaced by another isotope, can be expressed as the sum of a field shift and a mass shift, similar to the atomic case. We show that a linear relation holds between atomic and molecular isotopes shifts, thus extending the King-plot analysis to molecular isotope shifts. Optical isotope shifts in YbF and ZrO and infrared isotope shifts in SnH are analyzed with a molecular King-plot approach, utilizing Yb and Zr ionic isotope shifts and charge radii of Sn obtained with non-optical methods. The changes in the mean-squared nuclear charge radii of Yb and Zr extracted from the molecular transitions are found to be in excellent agreement with the values from the spectroscopy of Yb and Zr, respectively. On the contrary, in the case of the vibrational-rotational transition in SnH, no sensitivity to the nuclear volume could be deduced within the experimental resolution, which makes it unsuitable for the extraction of nuclear charge radii but provides insights into the molecular electronic wave function not accessible via other methods. The new opportunities offered by the molecular King-plot analysis for research in nuclear structure and molecular physics are discussed.

    Comments:
    Accepted at Physical Review X. Link to abstract: https://journals.aps.org/prx/accepted/be075Kf7E0c16505459d9fa833408356a593fd904
    Subjects:
    Atomic Physics (physics.atom-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th); physics.atm-clus (physics.atm-clus)
    arXiv:
    2301.11064 [pdf]
    PRX(2023)·6 citations

Affiliations

first authorsco-authorsvia INSPIRE