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Nuclear Theory·nucl-th

Wednesday·November 4, 2015

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 04

    [Submitted on 2 Nov 2015] (cross-list from hep-th)

    Vibrational quantisation of the B=7 Skyrmion

    C. J. Halcrow🇬🇧

    We consider the inclusion of the most important vibrational modes in the quantisation of the dodecahedral Skyrmion. In contrast to a rigid body quantisation, this formalism allows a spin state to lie below the spin state, in agreement with experimental data. There is also a low lying spin state and two spin states. We find that the excited spin state has a smaller root mean square charge radius than the other states. This prediction is an important signature of the Skyrme model, in conflict with more conventional nuclear models.

    Comments:
    24 pages, 6 figures
    Subjects:
    High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1511.00682 [pdf]
    NPB(2016)·61 citations
  2. 05

    [Submitted on 3 Nov 2015] (cross-list from hep-ph)

    Compositeness of Hadrons and Near-Threshold Dynamics

    Tetsuo Hyodo🇯🇵

    We present the recent developments in the studies of the structure of hadron resonances, focusing on the compositeness in terms of the hadronic degrees of freedom. We discuss the model dependence of the compositeness, and show that the structure of the near-threshold bound states and resonances is model-independently determined. The applications to various hadrons are summarized.

    Comments:
    9 pages, talk given at The 10th International Workshop on the Physics of Excited Nucleons (NSTAR2015) May 25-28, 2015, Osaka, Japan, to appear in JPS Conf. Proc
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1511.00870 [pdf]
    JPS Conf.Proc.(2016)·1 citation
  3. 06

    [Submitted on 3 Nov 2015] (cross-list from astro-ph.HE)

    Chiral transport of neutrinos in supernovae: Neutrino-induced fluid helicity and helical plasma instability

    Naoki Yamamoto🇯🇵

    Chirality of neutrinos modifies the conventional kinetic theory and hydrodynamics, leading to unusual chiral transport related to quantum anomalies in field theory. We argue that these corrections have new phenomenological consequences for hot and dense neutrino gases, especially in core-collapse supernovae. We find that the neutrino density can be converted to the fluid helicity through the chiral vortical effect. This fluid helicity effectively acts as a chiral chemical potential for electrons via the momentum exchange with neutrinos and induces a "helical plasma instability" that generates a strong helical magnetic field. This provides a new mechanism for converting the gravitational energy released by the core collapse to the electromagnetic energy and potentially explains the origin of magnetars. The other possible applications of the neutrino chiral transport theory are also discussed.

    Comments:
    13 pages, 3 figures; v2: published version; v3: error in Eq. (38) corrected
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
    arXiv:
    1511.00933 [pdf]
    PRD(2016)·124 citations

Affiliations

first authorsco-authorsvia INSPIRE