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Nuclear Theory·nucl-th

Tuesday·November 29, 2022

15 papers—7 primary·8 cross-listed

All15Primary7Cross-lists8
  1. 01

    [Submitted on 25 Nov 2022]

    Quantum Entanglement and the Thermal Hadron

    Pouya Asadi🇺🇸 · Varun Vaidya🇺🇸

    This paper tests how effectively the bound states of strongly interacting gauge theories are amenable to an emergent description as a thermal ensemble. This description can be derived from a conjectured minimum free energy principle, with the entanglement entropy of two-parton subsystems playing the role of thermodynamic entropy. This allows us to calculate the ground state hadron spectrum and wavefunction over a wide range of parton masses without solving the Schrödinger equation. We carry out this analysis for certain illustrative models in 1+1 dimensions and discuss prospects for higher dimensions.

    Comments:
    22 pages , 6 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Quantum Physics (quant-ph)
    arXiv:
    2211.14333 [pdf]
    PRD(2023)·12 citations
  2. 02

    [Submitted on 26 Nov 2022]

    Quarkyonic or baryquark matter? On the dynamical generation of momentum space shell structure

    Volker Koch🇺🇸 · Volodymyr Vovchenko🇺🇸

    We study the equation of state of a mixture of (quasi-)free constituent quarks and nucleons with hard-core repulsion at zero temperature. Two opposite scenarios for the realization of the Pauli exclusion principle are considered: (i) a Fermi sea of quarks surrounded by a shell of baryons -- the quarkyonic matter, and (ii) a Fermi sea of nucleons surrounded by a shell of quarks which we call \emph{baryquark matter}. In both scenarios, the sizes of the Fermi sea and shell are fixed through energy minimization at fixed baryon number density. While both cases yield a qualitatively similar transition from hadronic to quark matter, we find that baryquark matter is energetically favored in this setup and yields a physically acceptable behavior of the speed of sound without the need to introduce an infrared regulator. In order to retain the theoretically more appealing quarkyonic matter as the preferred form of dense QCD matter will thus require modifications to the existing dynamical generation mechanisms, such as, for example, the introduction of momentum-dependent nuclear interactions.

    Comments:
    6 pages, 3 figures, to be published in Physics Letters B
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2211.14674 [pdf]
    PLB(2023)·17 citations
  3. 03

    [Submitted on 27 Nov 2022]

    A model-free procedure to correct for volume fluctuations in E-by-E analyses of particle multiplicities

    Anar Rustamov🇩🇪 · Joachim Stroth🇩🇪 · Romain Holzmann🇩🇪

    We develop an innovative and unbiased procedure, based on event mixing, to account for unavoidable contributions from volume (or system size) fluctuations to experimentally measured moments of particle multiplicity distributions produced in relativistic nuclear collisions. Within the wounded-nucleon model they are characterized by fluctuations of the number of wounded nucleons, the latter usually referred to as participants. For the first time we extract participant fluctuations directly from the data used for the fluctuation analysis, i.e., without involving model calculations. To achieve this we constructed a dedicated event-mixing algorithm that eliminates all possible correlations between produced particles while preserving the volume fluctuations. The procedure provides direct access to the cumulants of wounded-nucleon distributions, which can be used to account for non-critical contributions to the experimentally measured cumulants of multiplicity distributions.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2211.14849 [pdf]
    NPA(2023)·17 citations
  4. 04

    [Submitted on 27 Nov 2022]

    Probing Fractional Quantum Hall Sheets in Dense Baryonic Matter

    Mannque Rho🇫🇷

    Unlike the octet baryons for , there is no skyrmion coming from the meson. It is instead described as a fractional quantum Hall droplet, a pancake or a pita involving a singular ring in which Chern-Simons fields live. By incorporating hidden local symmetry and hidden scale symmetry in nuclear dynamics, I describe how to access baryon-charged quantum Hall droplets in dense nuclear matter in terms of the nuclear scale-chiral effective field theory approach ``GEFT" with the anomaly taken into account. I discuss how the single-flavor baryon that I will call could be exposed in superdense baryonic matter, figuring, perhaps, in ``quark stars" associated with the baryon-quark continuity involving CFL or phase transitions.

    Comments:
    8 pages, no figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2211.14890 [pdf]
    5 citations
  5. 05

    [Submitted on 28 Nov 2022]

    High energy nucleus-nucleus collision and halo radii in different approaches of Glauber theory

    Yu.M. Shabelski🇷🇺 · A.G. Shuvaev🇷🇺

    The complete Glauber calculation of the differential cross sections of C--C and halo nuclei on C scattering was performed using the previously proposed in Refs.~\cite{Shabelski:2021iqk, Shabelski:2022xkw} method of generating function. The results are different as compared with the similar calculations in the optical model and the rigid target approximation. The halo nuclei radii extracted from the scattering data via the complete Glauber analysis come out to be larger than those obtained in the approximate approaches

    Comments:
    9 pages, 2 figures. Minor modifications, references added, typos corrected
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2211.15177 [pdf]
    Mod.Phys.Lett.A(2022)·1 citation
  6. 06

    [Submitted on 28 Nov 2022]

    Global constraint on the magnitude of anomalous chiral effects in heavy-ion collisions

    Wen-Ya Wu🇨🇳 · Qi-Ye Shou🇨🇳 · Panos Christakoglou🇳🇱 · Prottay Das🇮🇳 · Md. Rihan Haque🇵🇱 · Guo-Liang Ma🇨🇳 · Yu-Gang Ma🇨🇳 · Bedangadas Mohanty🇮🇳 · Chun-Zheng Wang🇨🇳 · Song Zhang🇨🇳 · Jie Zhao🇨🇳

    When searching for anomalous chiral effects in heavy-ion collisions, one of the most crucial points is the relationship between the signal and the background. In this letter, we present a simulation in a modified blast wave model at LHC energy, which can simultaneously characterize the majority of measurable quantities, in particular, the chiral magnetic effect (CME) and the chiral magnetic wave (CMW) observables. Such a universal description, for the first time, naturally and quantitatively unifies the CME and the CMW studies and brings to light the connection with the local charge conservation (LCC) background. Moreover, a simple phenomenological approach is performed to introduce the signals, aiming at quantifying the maximum allowable strength of the signals within experimental precision. Such a constraint provides a novel perspective to understand the experimental data and sheds new light on the study of anomalous chiral effects as well as charge dependent correlations.

    Comments:
    8 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2211.15446 [pdf]
    PRC(2023)·22 citations
  7. 07

    [Submitted on 28 Nov 2022]

    Directed flow of light flavor hadrons for Au+Au collisions at 7.7-200 GeV

    Tribhuban Parida🇮🇳 · Sandeep Chatterjee🇮🇳

    We have studied the directed flow of light-flavor hadrons for Au + Au collisions at 7.7 - 200 GeV. The initial condition is taken from a suitable Glauber model which is further evolved within the framework of relativistic hydrodynamics. Model calculations of the rapidity-odd directed flow () of identified light-flavor hadrons are compared with the available experimental data after suitably calibrating the initial condition to describe the rapidity dependence of charged particle multiplicity and net-proton yield. For reasonable choice of the initial condition, we are able to describe the measured rapidity and beam energy dependence of identified hadron including the observed splitting between baryons and anti-baryons.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2211.15659 [pdf]
    12 citations

Affiliations

first authorsco-authorsvia INSPIRE