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Nuclear Theory·nucl-th

Thursday·November 10, 2016

11 papers—9 primary·2 cross-listed

All11Primary9Cross-lists2
  1. 10

    [Submitted on 9 Nov 2016] (cross-list from hep-ph)

    Tetra-Quark Interpretation of X(3872) and Z_c(3900) Revisited

    Kunihiko Terasaki🇯🇵

    In relation to the newly observed bottom-strange X^{+,-}(5568) mesons, we revisit our tetra-quark interpretation of X(3872) and Z_c(3900). It is discussed that our assignment of X^{+,-}(5568) to charged components of iso-triplet bottom partners of D_{s0}^+(2317) is compatible with the revised version of our tetra-quark interpretation of X(3872) and Z_c(3900).

    Comments:
    6 pages, 0 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1611.02825 [pdf]
    2 citations
  2. 11

    [Submitted on 9 Nov 2016] (cross-list from hep-ph)

    Analytical On-shell Calculation of Higher Order Scattering: Massless Particles

    Barry R. Holstein🇺🇸

    We demonstrate that the use of on-shell methods involving calculation of the discontinuity across the t-channel cut associated with the exchange of a pair of massless particles can be used to evaluate loop contributions to the electromagnetic and gravitational scattering of both massive and massless particles. In the gravitational case the use of factorization permits a straightforward and algebraic calculation of higher order scattering results, which were obtained previously by considerably more arduous Feynman diagram techniques.

    Comments:
    38 pages, 5 figures. arXiv admin note: text overlap with arXiv:1610.07957
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1611.03074 [pdf]
    4 citations

Affiliations

first authorsco-authorsvia INSPIRE