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Nuclear Theory·nucl-th

Monday·May 24, 2021

9 papers—4 primary·5 cross-listed

All9Primary4Cross-lists5
  1. 05

    [Submitted on 17 May 2021] (cross-list from hep-ph)

    Heavy quark potential in quark-gluon Plasma: Deep neural network meets lattice quantum chromodynamics

    Shuzhe Shi🇨🇦 · Kai Zhou🇩🇪 · Jiaxing Zhao🇨🇳 · Swagato Mukherjee🇺🇸 · Pengfei Zhuang🇨🇳

    Bottomonium states are key probes for experimental studies of the quark-gluon plasma (QGP) created in high-energy nuclear collisions. Theoretical models of bottomonium productions in high-energy nuclear collisions rely on the in-medium interactions between the bottom and antibottom quarks. The latter can be characterized by the temperature () dependent potential, with real () and imaginary () parts, as a function of the spatial separation (). Recently, the masses and thermal widths of up to and bottomonium states in QGP were calculated using lattice quantum chromodynamics (LQCD). Starting from these LQCD results and through a novel application of deep neural network, here, we obtain and in a model-independent fashion. The temperature dependence of was found to be very mild between ~MeV. For ~MeV, shows a rapid increase with and , which is much larger than the perturbation-theory-based expectations.

    Comments:
    16 pages, 10 figures; Published version; Data for plots enclosed
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2105.07862 [pdf]
    PRD(2022)·74 citations
  2. 06

    [Submitted on 17 May 2021] (cross-list from astro-ph.HE)

    Diffusion as a leading dissipative mechanism in superconducting neutron stars

    K.Y. Kraav🇷🇺 · M.E. Gusakov🇷🇺 · E.M. Kantor🇷🇺

    Despite the fact that different particle species can diffuse with respect to each other in neutron star (NS) cores, the effect of particle diffusion on various phenomena associated with NS oscillations is usually ignored. Here we demonstrate that the diffusion can be extremely powerful dissipative mechanism in superconducting NSs. In particular, it can be much more efficient than the shear and bulk viscosities. This result has important implications for the damping times of NS oscillations, development and saturation of dynamical instabilities in NSs, and for the excitation and coupling of oscillation modes during the late inspiral of binary NSs.

    Comments:
    6 pages, 3 figures, version accepted for publication in MNRAS Letters
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); Nuclear Theory (nucl-th)
    arXiv:
    2105.08121 [pdf]
    MNRAS(2021)·10 citations
  3. 07

    [Submitted on 21 May 2021] (cross-list from hep-ph)

    Azimuthal correlations in diffractive scattering at the Electron-Ion Collider

    Adrian Dumitru🇺🇸 · Heikki Mäntysaari🇫🇮 · Risto Paatelainen🇫🇮 · Kaushik Roy🇩🇪 · Farid Salazar🇺🇸 · Björn Schenke🇺🇸

    We calculate azimuthal correlations between the exclusively produced vector meson and the scattered electron in Deep Inelastic Scattering processes at the future Electron-Ion Collider (EIC). We identify "kinematical" and "intrinsic" contributions to these correlations, and show that the correlations are sensitive to the non-trivial correlations in the gluon distribution of the target. Realistic predictions at the EIC kinematics are provided using two different approaches to describe the dipole-proton interaction at relatively small .

    Comments:
    Contribution to the proceedings of DIS 2021, to be submitted to SciPost Proceedings
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2105.10144 [pdf]
    SciPost Phys.Proc.(2022)·5 citations
  4. 08

    [Submitted on 21 May 2021] (cross-list from hep-th)

    Positive magnetoresistance induced by hydrodynamic fluctuations in chiral media

    Noriyuki Sogabe🇨🇳 · Naoki Yamamoto🇯🇵 · Yi Yin🇨🇳

    We analyze the combined effects of hydrodynamic fluctuations and chiral magnetic effect (CME) for a chiral medium in the presence of a background magnetic field. Based on the recently developed non-equilibrium effective field theory, we show fluctuations give rise to a CME-related positive contribution to magnetoresistance, while the early studies without accounting for the fluctuations find a CME-related negative magnetoresistance. At zero axial relaxation rate, the fluctuations contribute to the transverse conductivity in addition to the longitudinal one.

    Comments:
    31 pages, 3 figures, published version
    Subjects:
    High Energy Physics — Theory (hep-th); Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2105.10271 [pdf]
    JHEP(2021)·8 citations

Affiliations

first authorsco-authorsvia INSPIRE