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Nuclear Theory·nucl-th

Monday·April 11, 2016

5 papers—2 primary·3 cross-listed

All5Primary2Cross-lists3
  1. 01

    [Submitted on 8 Apr 2016]

    Nuclear chiral and magnetic rotation in covariant density functional theory

    Jie Meng · Pengwei Zhao

    Excitations of chiral rotation observed in triaxial nuclei and magnetic and/or antimagnetic rotations seen in near-spherical nuclei have attracted a lot of attention. Unlike conventional rotation in well-deformed or superdeformed nuclei, here the rotational axis is not necessary coinciding with any principal axis of the nuclear density distribution. Thus, tilted axis cranking is mandatory to describe these excitations self-consistently in the framework of covariant density functional theory (CDFT). We will briefly introduce the formalism of tilted axis cranking CDFT and its application for magnetic and antimagnetic rotation phenomena. Configuration-fixed CDFT and its predictions for nuclear chiral configurations and for favorable triaxial deformation parameters are also presented, and the discoveries of the multiple chiral doublets (Mḩi}D) in 133Ce and 103Rh are discussed.

    Comments:
    21 pages, 19 figures, an invited comment to Physica Scripta to the Focus Issue on Nuclear Structure: Celebrating the 75 Nobel Prize, in press
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1604.02213 [pdf]
    Phys.Scripta(2016)·83 citations
  2. 02

    [Submitted on 8 Apr 2016]

    Form factor ratio from unpolarized elastic electron proton scattering

    Simone Pacetti🇮🇹 · Egle Tomasi Gustafsson🇫🇷

    A reanalysis of unpolarized electron-proton elastic scattering data is done in terms of the electric to magnetic form factor squared ratio. This observable is in principle more robust against experimental correlations and global normalizations. The present analysis shows indeed that it is a useful quantity that contains reliable and coherent information. The comparison with the ratio extracted from the measurement of the longitudinal to transverse polarization of the recoil proton in polarized electron-proton scattering shows that the results are compatible within the experimental errors. Limits are set on the kinematics where the physical information on the form factors can be safely extracted. The results presented in this work bring a decisive piece of information to the controversy on the deviation of the proton form factors from the dipole dependence.

    Comments:
    18 pages 13 figures, 11 tables- Updated version for Phys. Rev. C
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1604.02421 [pdf]
    PRC(2016)·12 citations

Affiliations

first authorsco-authorsvia INSPIRE