PaperPanorama
FAQ

Nuclear Theory·nucl-th

Wednesday·November 27, 2019

5 papers—4 primary·1 cross-listed

All5Primary4Cross-lists1
  1. 01

    [Submitted on 25 Nov 2019]

    Valence structures of light and strange mesons from the basis light-front quantization framework

    Shaoyang Jia🇺🇸 · James P. Vary🇺🇸

    We apply the basis light-front quantization framework to solve for the structures of mesons with light and strange valence quarks. Our approach treats mesons as relativistic bound states with quarks confined in both the transverse direction and the light-front longitudinal direction. The spin-orbit interactions of these confined quarks are further specified by the Nambu--Jona-Lasinio model. We address the axial anomaly by including the Kobayashi-Maskawa-'t Hooft interaction regularized by our basis. We present the structures of the pion, the kaon, the eta meson, and the eta-prime meson in terms of their valence light-front wave functions obtained from the eigenvalue problem of our light-front Hamiltonian.

    Comments:
    Parallel session talk proceeding for the 18th International Conference on Hadron Spectroscopy and Structure (HADRON2019)
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Theory (hep-th)
    arXiv:
    1911.11191 [pdf]
    1 citation
  2. 02

    [Submitted on 26 Nov 2019]

    Neutrino-Deuteron Reactions at Solar Neutrino Energies in Pionless Effective Field Theory with Dibaryon Fields

    Shung-Ichi Ando🇰🇷 · Young-Ho Song🇰🇷 · Chang Ho Hyun🇰🇷

    We study breakup of the deuteron induced by neutrinos in the neutral , and the charged , processes. Pionless effective field theory with dibaryon fields is used to calculate the total cross sections for neutrino energies from threshold to 20 MeV. Amplitudes are expanded up to next-to-leading order, and the partial wave is truncated at -waves. The Coulomb interaction between two protons is included nonperturbatively in the reaction amplitudes, and an analytic expression of the amplitudes is obtained. The contribution of the next-to-leading order to the total cross section is in the range of 5.29.9\% in magnitude, and that of the -wave is 2.42.8\% at MeV. Uncertainty arising from an axial isovector low-energy constant is estimated to be on the order of 1\%.

    Comments:
    25 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1911.11307 [pdf]
    PRC(2020)·11 citations
  3. 03

    [Submitted on 26 Nov 2019]

    The eikonal model of reactions involving exotic nuclei; Roy Glauber's legacy in today's nuclear physics

    Pierre Capel

    In this contribution, the eikonal approximation developed by Roy Glauber to describe high-energy quantum collisions is presented. This approximation has been-and still is-extensively used to analyse reaction measurements performed to study the structure of nuclei far from stability. This presentation focuses more particularly on the application of the eikonal approximation to the study of halo nuclei in modern nuclear physics. To emphasise Roy Glauber's legacy in today's nuclear physics, recent extensions of this model are reviewed.

    Comments:
    Contribution to the proceedings of 24th edition of the European Few-Body Conference (Surrey, UK, 2-4 September 2019). 14 pages, 9 figures. Minor corrections to the first version following the Referee's comments
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex); History and Philosophy of Physics (physics.hist-ph)
    arXiv:
    1911.11446 [pdf]
    SciPost Phys.Proc.(2020)·4 citations
  4. 04

    [Submitted on 26 Nov 2019]

    Parton Distribution Functions of Heavy Mesons on the Light Front

    Jiangshan Lan🇨🇳 · Chandan Mondal🇨🇳 · Meijian Li🇺🇸 · Yang Li🇺🇸 · Shuo Tang🇺🇸 · Xingbo Zhao🇨🇳 · James P. Vary🇺🇸

    The parton distribution functions (PDFs) of heavy mesons are evaluated from their light-front wave functions, which are obtained from a basis light-front quantization in the leading Fock sector representation. We consider the mass eigenstates from an effective Hamiltonian consisting of the confining potential adopted from light-front holography in the transverse direction, a longitudinal confinement, and a one-gluon exchange interaction with running coupling. We present the gluon and the sea quark PDFs which we generate dynamically from the QCD evolution of the valence quark distributions.

    Comments:
    13 pages, 8 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1911.11676 [pdf]
    PRD(2020)·68 citations
  5. 05

    [Submitted on 26 Nov 2019] (cross-list from hep-ph)

    Sub-threshold and Production in Collisions

    Yoshitaka Hatta (BNL)🇺🇸 · Mark Strikman (PSU)🇺🇸 · Ji Xu (SJTU)🇨🇳 · Feng Yuan (LBNL)🇺🇸

    We study sub-threshold heavy quarkonium ( and ) photo-productions in collisions as an independent test of the universality of the nucleon-nucleon short range correlation (SRC) in nuclear scattering processes. Just below the threshold, the cross section is dominated by the mean field contribution of nucleons inside the nucleus. The SRC contributions start to dominate at lower photon energies, depending on the fraction of the SRC pairs in the target nucleus. We give an estimate of the cross sections in the sub-threshold region both for and . This may be helpful for future measurements at JLab as well as at the Electron-Ion Collider in the U.S., and especially in China.

    Comments:
    7 pages, 5 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1911.11706 [pdf]
    PLB(2020)·31 citations

Affiliations

first authorsco-authorsvia INSPIRE