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Nuclear Theory·nucl-th

Thursday·July 20, 2023

13 papers—5 primary·8 cross-listed

All13Primary5Cross-lists8
  1. 01

    [Submitted on 18 Jul 2023]

    Lowest-order QED radiative corrections in unpolarized elastic electron-deuteron scattering beyond the ultra-relativistic limit for the proposed deuteron charge radius measurement at Jefferson Laboratory

    Jingyi Zhou🇺🇸 · Vladimir Khachatryan🇺🇸 · Igor Akushevich🇺🇸 · Haiyan Gao🇺🇸 · Alexander Ilyichev🇧🇾 · Chao Peng🇺🇸 · Stanislav Srednyak🇺🇸 · Weizhi Xiong🇨🇳

    Analogous to the well-known proton charge radius puzzle, a similar puzzle exists for the deuteron charge radius, . There are discrepancies observed in the results of , measured from electron-deuteron () scattering experiments, as well as from atomic spectroscopy. In order to help resolve the charge radius puzzle of the deuteron, the PRad collaboration at Jefferson Lab has proposed an experiment for measuring , named DRad. This experiment is designed to measure the unpolarized elastic scattering cross section in a low- region. To extract the cross section with a high precision, having reliable knowledge of QED radiative corrections is important. In this paper, we present complete numerical calculations of the lowest-order radiative corrections in scattering for the DRad kinematics. The calculations have been performed within a covariant formalism and beyond the ultra-relativistic approximation (). Besides, we present a systematic uncertainty on arising from higher-order radiative corrections, estimated based on our cross-section results.

    Comments:
    16 pages and 6 figures
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2307.09680 [pdf]
    EPJA(2023)·2 citations
  2. 02

    [Submitted on 19 Jul 2023]

    Quantization of the kinetic energy of a deformed nucleus in curvilinear coordinates

    M. S. Nadirbekov · O. A. Bozarov · N. Minkov

    The quantization of the kinetic energy of a deformed nucleus in curvilinear coordinates in the case of octupole oscillations of its surface firstly has been carried out. The obtained form of the Hamiltonian differs from the previously obtained Hamiltonian for quadrupole oscillations only by factors in front of the derivatives and . An explicit form of the kinetic energy of the Hamiltonian of even-even nuclei with free and effective triaxiality, as well as for axially symmetric even-even nuclei, is given.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2307.09773 [pdf]
    1 citation
  3. 03

    [Submitted on 19 Jul 2023]

    Bulk viscosity of rotating, hot and dense spin 1/2 fermionic systems from correlation functions

    Sarthak Satapathy🇮🇳

    In this work we have presented the one-loop calculation of the bulk viscosity of a system of rotating, hot and dense spin 1/2 fermions within the framework of Kubo formalism calculated from correlation functions of fields which in turn is used to calculate the spectral function of energy-momentum tensors. The calculation has been done in curved space by the help of tetrad formalism, where the the gamma matrices in this set-up assume their generic structure by becoming space dependent. The techniques of thermal field theory have been employed which take into account the three energy scales viz. temperature, chemical potential and angular velocity into account in the Matsubara frequency summation. The study has been performed in the ambience of very large angular velocities, ranging from 0.1 to 1.0 GeV. The fermion propagator used in this work is appropiate for the regime of large angular velocities. We explore the behaviour of bulk viscosity with angular velocity, temperature and chemical potential through our plots.

    Comments:
    17 pages, 4 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2307.09953 [pdf]
    3 citations
  4. 04

    [Submitted on 19 Jul 2023]

    Electromagnetic probes in heavy-ion collisions: progress and open questions

    Jean-François Paquet🇺🇸

    I present an overview of photon and dilepton production in heavy-ion collisions, highlighting recent progress and ongoing challenges, with focus on hard initial scatterings, pre-equilibrium electromagnetic emission, as well as thermal and hadronic production. The potential of photons and dileptons to probe low-energy collisions is discussed briefly.

    Comments:
    1 figure, 10 pages, contribution to Hard Probes 2023 proceedings
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2307.09967 [pdf]
    PoS(2024)·5 citations
  5. 05

    [Submitted on 19 Jul 2023]

    Inclusion of electroproduction data in a coupled channel analysis

    M. Mai🇩🇪 · J. Hergenrather🇺🇸 · M. Döring🇺🇸 · T. Mart🇮🇩 · Ulf-G. Meißner🇩🇪 · D. Rönchen🇩🇪 · R. Workman🇺🇸

    Exclusive electroproduction reactions provide an access to the structure of excited baryons. To extract electroproduction multipoles encoding this information, the Jülich-Bonn-Washington (JBW) analysis framework is extended to the analysis of differential cross sections in electroproduction. This update enlarges the scope of previous coupled-channel analyses of pions and eta mesons, with photoproduction reactions as boundary condition in all analyzed electroproduction reactions. Polarization observables are predicted and compared to recent CLAS data. The comparison shows the relevance of these data to pin down baryon properties.

    Comments:
    21 pages, 13 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    2307.10051 [pdf]
    EPJA(2023)·20 citations

Affiliations

first authorsco-authorsvia INSPIRE