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Nuclear Theory·nucl-th

Wednesday·April 1, 2015

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 04

    [Submitted on 30 Mar 2015] (cross-list from hep-ph)

    Complete plasmon spectrum of two-stream system

    Katarzyna Deja🇵🇱 · Stanislaw Mrowczynski🇵🇱

    The complete spectrum of plasmons of the two interpenetrating plasma streams is found in a closed analytic form. The orientation of the wave vector with respect to the stream direction is arbitrary and the plasmas, which are assumed to be collisionless and spatially homogeneous, can be nonrelativistic, relativistic or even ultrarelativistic. Our results apply to the electromagnetic plasma of electrons and passive ions and to the quark-gluon plasma governed by QCD.

    Comments:
    10 pages, 5 figures, minor corrections
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1503.08861 [pdf]
    Acta Phys.Polon.B(2015)·1 citation
  2. 05

    [Submitted on 24 Mar 2015] (cross-list from physics.gen-ph)

    Effects of the interaction between the magnetic moments on the energy levels of a pionic atom

    Voicu Dolocan🇷🇴

    We present the calculation of the binding energy of 2p pion for various central charges Z. We have taken into account the interaction between the magnetic moment of the nucleus and the orbital magnetic moment of the pion. The obtained results show that the interaction between the magnetic moments decreases teh binding energy. This decrease is larger when the two magnetic moments add one another. Also, the binding energy increases with Z increasing.

    Comments:
    6 pqges
    Subjects:
    physics.gen-ph (physics.gen-ph); Nuclear Theory (nucl-th)
    arXiv:
    1503.09125 [pdf]
    0 citations
  3. 06

    [Submitted on 31 Mar 2015] (cross-list from hep-ph)

    Light Quarks in the Screened Dyon-Anti-Dyon Coulomb Liquid Model II

    Yizhuang Liu🇺🇸 · Edward Shuryak🇺🇸 · Ismail Zahed🇺🇸

    We discuss an extension of the dyon-anti-dyon liquid model that includes light quarks in the dense center symmetric Coulomb phase. In this work, like in our previous one, we use the simplest color SU(2) group. We start with a single fermion flavor and explicitly map the theory onto a 3-dimensional quantum effective theory with a fermion that is only U symmetric. We use it to show that the dense center symmetric plasma develops, in the mean field approximation, a nonzero chiral condensate, although the ensuing Goldstone mode is massive due to the U axial-anomaly. We estimate the chiral condensate and meson masses for . We then extend our analysis to several flavors and colors and show that center symmetry and spontaneous chiral symmetry breaking disappear simultaneously when in the dense plasma phase. A reorganization of the dense plasma phase into a gas of dyon-antidyon molecules restores chiral symmetry, but may preserve center symmetry in the linearized approximation. We estimate the corresponding critical temperature.

    Comments:
    16 pages, 5 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1503.09148 [pdf]
    PRD(2015)·59 citations

Affiliations

first authorsco-authorsvia INSPIRE