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Nuclear Theory·nucl-th

Wednesday·May 18, 2016

11 papers—8 primary·3 cross-listed

All11Primary8Cross-lists3
  1. 09

    [Submitted on 16 May 2016] (cross-list from hep-ph)

    Polarization and dilepton anisotropy in pion-nucleon collisions

    Enrico Speranza🇩🇪 · Miklós Zétényi🇩🇪 · Bengt Friman🇩🇪

    Hadronic polarization and the related anisotropy of the dilepton angular distribution are studied for the reaction . We employ consistent effective interactions for baryon resonances up to spin-5/2, where non-physical degrees of freedom are eliminated, to compute the anisotropy coefficients for isolated intermediate baryon resonances. It is shown that the spin and parity of the intermediate baryon resonance is reflected in the angular dependence of the anisotropy coefficient. We then compute the anisotropy coefficient including the and resonances, which are essential at the collision energy of the recent data obtained by the HADES collaboration on this reaction. We conclude that the anisotropy coefficient provides useful constraints for unravelling the resonance contributions to this process.

    Comments:
    11 pages, 5 figures, version accepted for publication in Physics Letters B
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1605.04954 [pdf]
    PLB(2017)·19 citations
  2. 10

    [Submitted on 17 May 2016] (cross-list from hep-ph)

    What do we know about neutrinoless double-beta decay nuclear matrix elements?

    J. Menéndez🇯🇵

    The detection of neutrinoless double-beta decay will establish the Majorana nature of neutrinos. In addition, if the nuclear matrix elements of this process are reliably known, the experimental lifetime will provide precious information about the absolute neutrino masses and hierarchy. I review the status of nuclear structure calculations for neutrinoless double-beta decay matrix elements, and discuss some key issues to be addressed in order to meet the demand for accurate nuclear matrix elements.

    Comments:
    Talk presented at NuPhys2015 (London, 16-18 December 2015). 8 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1605.05059 [pdf]
    7 citations
  3. 11

    [Submitted on 17 May 2016] (cross-list from hep-ph)

    Shear Viscosity of Turbulent Chiral Plasma

    Avdhesh Kumar🇮🇳 · Jitesh R. Bhatt🇮🇳 · Amita Das🇮🇳 · P. K. Kaw🇮🇳

    It is well known that the difference between the chemical potentials of left-handed and right-handed particles in a parity violating (chiral) plasma can lead to an instability. We show that the chiral instability may drive turbulent transport. Further we estimate the anomalous viscosity of chiral plasma arising from the enhanced collisionality due to turbulence.

    Comments:
    8 pages, 1 figure
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1605.05295 [pdf]
    1 citation

Affiliations

first authorsco-authorsvia INSPIRE