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Nuclear Theory·nucl-th

Monday·April 11, 2016

5 papers—2 primary·3 cross-listed

All5Primary2Cross-lists3
  1. 01

    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.

    nucl-thPhys.Scripta(2016)·83 citations
  2. 02

    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.

    nucl-thhep-phPRC(2016)·12 citations
  3. 03

    Workshop on Physics with Neutral Kaon Beam at JLab (KL2016) Mini-Proceedings

    M. Albrow · M. Amaryan · E. Chudakov · P. Degtyarenko · A. Feijoo · C. Fernandez-Ramirez · I.P. Fernando · A. Filippi · J.L. Goity · H. Haberzettl · B.C. Jackson · H. Kamano and 25 other authors

    The KL2016 Workshop is following the Letter of Intent LoI12-15-001 "Physics Opportunities with Secondary KL beam at JLab" submitted to PAC43 with the main focus on the physics of excited hyperons produced by the Kaon beam on unpolarized and polarized targets with GlueX setup in Hall D. Such studies will broaden a physics program of hadron spectroscopy extending it to the strange sector. The Workshop was organized to get a feedback from the community to strengthen physics motivation of the LoI and prepare a full proposal. Further details about the Workshop can be found on the web page of the conference: http://www.jlab.org/conferences/kl2016/index.html .

    ↳ hep-phhep-exnucl-exnucl-th21 citations
  4. 04

    Clustering in stable and exotic nuclei

    C. Beck🇫🇷

    Since the pioneering discovery of molecular resonances in the 12C+12C reaction more than half a century ago a great deal of research work has been undertaken in alpha clustering. Our knowledge on physics of nuclear molecules has increased considerably and nuclear clustering remains one of the most fruitful domains of nuclear physics, facing some of the greatest challenges and opportunities in the years ahead. The occurrence of "exotic" shapes and Bose-Einstein alpha condensates in light N=Z alpha-conjugate nuclei is investigated. Various approaches of the superdeformed and hyperdeformed bands associated with quasimolecular resonant structures are presented. Evolution of clustering from stability to the drip-lines is examined: clustering aspects are, in particular, discussed for light exotic nuclei with large neutron excess such as neutron-rich Oxygen isotopes with their complete spectroscopy.

    ↳ nucl-exnucl-thNuclear Particle Correlations and Cluster…·2 citations
  5. 05

    Degrees of Freedom of the Quark Gluon Plasma, tested by Heavy Mesons

    H. Berrehrah🇩🇪 · M. Nahrgang🇺🇸 · T. Song🇩🇪 · V. Ozvenchuck🇵🇱 · P.B. Gossiaux🇫🇷 · K. Werner🇫🇷 · E. Bratkovskaya🇩🇪 · J. Aichelin🇫🇷

    Heavy quarks (charm and bottoms) are one of the few probes which are sensitive to the degrees of freedom of a Quark Gluon Plasma (QGP), which cannot be revealed by lattice gauge calculations in equilibrium. Due to the rapid expansion of the QGP energetic heavy quarks do not come to an equilibrium with the QGP. Their energy loss during the propagation through the QGP medium depends strongly on the modelling of the interaction of the heavy quarks with the QGP quarks and gluons, i.e. on the assuption of the degrees of freedom of the plasma. Here we compare the results of different models, the pQCD based Monte-Carlo (MC@sHQ), the Dynamical Quasi Particle Model (DQPM) and the effective mass approach, for the drag force in a thermalized QGP and discuss the sensitivity of heavy quark energy loss on the properties of the QGP as well as on non-equilibrium dynamics

    ↳ hep-phnucl-thFIAS Interdisc.Sci.Ser.(2017)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE