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Nuclear Theory·nucl-th

Tuesday·November 15, 2016

16 papers—12 primary·4 cross-listed

All16Primary12Cross-lists4
  1. 13

    [Submitted on 11 Nov 2016] (cross-list from hep-th)

    Parity Breaking Medium and Squeeze Operators

    A. A. Andrianov🇪🇸 · S. S. Kolevatov🇷🇺 · R. Soldati🇮🇹

    The transition between a Minkowski space region and a parity breaking medium domain is thoroughly discussed. The requirement of continuity of the field operator content across the separating boundary of the two domains leads to Bogolyubov transformations, squeezed pairs states and squeeze operators that turn out to generate a functional SU(2) algebra. According to this algebraic approach, the reflection and transmission probability amplitude across the separating boundary are computed. The probability rate of the emission or absorption of squeezed pairs out of the vacuum (generalization of the Sauter-Schwinger-Nikishov formula) is obtained.

    Comments:
    22 pages, slightly modified, arXiv admin note: text overlap with arXiv:1109.3440
    Subjects:
    High Energy Physics — Theory (hep-th); High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1611.03903 [pdf]
    PRD(2017)·1 citation
  2. 14

    [Submitted on 14 Nov 2016] (cross-list from hep-ph)

    Baryon-to-meson transition distribution amplitudes: formalism and models

    B. Pire🇫🇷 · K. Semenov-Tian-Shansky🇷🇺 · L. Szymanowski🇵🇱

    In specific kinematics, hard exclusive amplitudes may be factorized into a short distance dominated part computable in a perturbative way on the one hand, and universal, confinement related hadronic matrix elements on the other hand. The extension of this description to processes such as backward meson electroproduction and forward meson production in antiproton-nucleon scattering leads to define new hadronic matrix elements of three quark operators on the light cone, the nucleon-to-meson transition distribution amplitudes, which shed a new light on the nucleon structure.

    Comments:
    8 pages, to be published in the proceedings of the the Light Cone 2016 Conference, Lisbon, Portugal, September 5 - 8, 2016
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1611.04297 [pdf]
    Few Body Syst.(2017)·3 citations
  3. 15

    [Submitted on 14 Nov 2016] (cross-list from hep-ph)

    Charming quasi-exotic open-flavor mesons

    Thomas Hilger🇦🇹 · Andreas Krassnigg🇦🇹

    We discuss charmed mesons in the covariant Dyson-Schwinger-Bethe-Salpeter-equation approach. In particular we computed masses, leptonic decay constants, and an orbital-angular-momentum decomposition for a basic set of states. We also report an efficient way to treat the two coupled quark propagator dressing functions via a single function.

    Comments:
    10 pages, 8 figures, 'XII Confinement and the hadron spectrum'-proceedings contribution
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1611.04334 [pdf]
    EPJ Web Conf.(2017)·8 citations
  4. 16

    [Submitted on 14 Nov 2016] (cross-list from hep-ph)

    Heavy-Light Mesons in Chiral AdS/QCD

    Yizhuang Liu🇺🇸 · Ismail Zahed🇺🇸

    We discuss a minimal holographic model for the description of heavy-light and light mesons with chiral symmetry, defined in a slab of AdS space. The model consists of a pair of chiral Yang-Mills and tachyon fields with specific boundary conditions that break spontaneously chiral symmetry in the infrared. The heavy-light spectrum and decay constants are evaluated explicitly. In the heavy mass limit the model exhibits both heavy-quark and chiral symmetry and allows for the explicit derivation of the one-pion axial couplings to the heavy-light mesons.

    Comments:
    9 pages
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1611.04400 [pdf]
    PLB(2017)·24 citations

Affiliations

first authorsco-authorsvia INSPIRE