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Nuclear Theory·nucl-th

Thursday·August 23, 2018

7 papers—5 primary·2 cross-listed

All7Primary5Cross-lists2
  1. 06

    [Submitted on 21 Aug 2018] (cross-list from hep-ph)

    Double charged heavy constituents of dark atoms and superheavy nuclear objects

    Vakhid A. Gani🇷🇺 · Maxim Yu. Khlopov🇷🇺 · Dmitry N. Voskresensky🇷🇺

    We consider the model of composite dark matter assuming stable particles of charge bound with primordial helium nuclei by Coulomb force in He atoms. We study capture of such dark atoms in matter and propose a possibility of existence of stable -enriched superheavy nuclei and -nuclearites, in which heavy -dark matter fermions are bound by electromagnetic forces with ordinary nuclear matter. He atoms accumulation in stars and its possible effect in stellar evolution is also considered, extending the set of indirect probes for composite dark matter.

    Comments:
    15 pages; v2: some changes in the Introduction and Conclusion sections, references added; matches the published version
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO); Nuclear Theory (nucl-th)
    arXiv:
    1808.06816 [pdf]
    PRD(2019)·21 citations
  2. 07

    [Submitted on 21 Aug 2018] (cross-list from hep-ph)

    A multiquark approach to excited hadrons and Regge trajectories

    S. S. Afonin🇷🇺

    We propose a novel approach to construction of hadron spectroscopy. The case of light nonstrange mesons is considered. By assumption, all such mesons above 1 GeV appear due to creation of constituent quark-antiquark pairs inside the pi or rho (omega) mesons. These spin-singlet or triplet pairs dictate the quantum numbers of formed resonance. The resulting classification of light mesons turns out to be in a better agreement with the experimental observations than the standard quark model classification. It is argued that the total energy of quark components should be proportional to the hadron mass squared rather than the linear mass. As a byproduct a certain relation expressing the constituent quark mass via the gluon and quark condensate is put forward. We show that our approach leads to an effective mass counting scheme for meson spectrum and results in the linear Regge and radial Regge trajectories by construction. An experimental observation of these trajectories might thus serve as an evidence not for string but for multiquark structure of highly excited hadrons.

    Comments:
    15 pages. arXiv admin note: substantial text overlap with arXiv:1705.01899
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1808.07363 [pdf]
    Adv.High Energy Phys.(2019)·7 citations

Affiliations

first authorsco-authorsvia INSPIRE