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Nuclear Theory·nucl-th

Thursday·February 17, 2022

8 papers—2 primary·6 cross-listed

All8Primary2Cross-lists6
  1. 01

    [Submitted on 15 Feb 2022]

    Can nuclear matter consist of -particles?

    B. E. Grinyuk🇺🇦

    A sufficient condition for the spatial collapse in an infinite system of interacting Bose particles is obtained on the basis of the variational principle with the use of trial functions with the Jastrow pair correlation factors. The instability of a hypothetical infinite system of -particles with respect to the spatial collapse is shown under the assumption of the Ali - Bodmer interaction potentials between such Bose particles. Thus, it becomes clear why the hypothetical nuclear matter is naturally treated with the use of at least the nucleon degrees of freedom.

    Comments:
    5 pages, 1 Encapsulated PostScript figure, uses ujp.sty
    Subjects:
    Nuclear Theory (nucl-th); cond-mat.other (cond-mat.other); Quantum Physics (quant-ph)
    arXiv:
    2202.07724 [pdf]
    Ukr.J.Phys.(2022)·0 citations
  2. 02

    [Submitted on 16 Feb 2022]

    Magnetic field induced hair structure in charmonium gluon-dissociation

    Jin Hu🇨🇳 · Shuzhe Shi🇨🇦 · Zhe Xu🇨🇳 · Jiaxing Zhao🇨🇳 · Pengfei Zhuang🇨🇳

    We study electromagnetic field effect on charmonium gluon-dissociation in quark-gluon plasma. With the effective Hamiltonian derived from QCD multipole expansion under an external electromagnetic field, we first solve the two-body Schrödinger equation for a pair of charm quarks with mean field potentials for color and electromagnetic interactions and obtain the charmonium binding energies and wave functions, and then calculate the gluon-dissociation cross-section and decay width by taking the color electric and magnetic dipole interactions as perturbations above the mean field and employing Fermi's Golden Rule. Considering the charmonium deformation in magnetic field, the discrete Landau energy levels make the dissociation cross-section grow hair, and the electric dipole channel is significantly changed, especially for the wave states and . From our numerical calculation, the magnetic field strength already changes the gluon dissociation strongly, which may indicate measurable effects in high-energy nuclear collisions.

    Comments:
    10 pages, 4 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2202.07938 [pdf]
    PRD(2022)·12 citations

Affiliations

first authorsco-authorsvia INSPIRE