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Nuclear Theory·nucl-th

Friday·July 1, 2016

11 papers—4 primary·7 cross-listed

All11Primary4Cross-lists7
  1. 01

    [Submitted on 30 Jun 2016]

    New neutron-rich isotope production in Sm+Gd

    Ning Wang🇨🇳 · Lu Guo🇨🇳

    Deep inelastic scattering in Sm+Gd at energies above the Bass barrier is for the first time investigated with two different microscopic dynamics approaches: improved quantum molecular dynamics (ImQMD) model and time dependent Hartree-Fock (TDHF) theory. No fusion is observed from both models. The capture pocket disappears for this reaction due to strong Coulomb repulsion and the contact time of the di-nuclear system formed in head-on collisions is about 700 fm/c at an incident energy of 440 MeV. The isotope distribution of fragments in the deep inelastic scattering process is predicted with the simulations of the latest ImQMD-v2.2 model together with a statistical code (GEMINI) for describing the secondary decay of fragments. More than 40 extremely neutron-rich unmeasured nuclei with are observed and the production cross sections are at the order of to mb. The multi-nucleon transfer reaction of Sm+Gd could be an alternative way to synthesize new neutron-rich lanthanides which are difficult to be produced with traditional fusion reactions or fission of actinides.

    Comments:
    5 figures, accepted for publication in Phys. Lett. B
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1606.09330 [pdf]
    PLB(2016)·91 citations
  2. 02

    [Submitted on 30 Jun 2016]

    The effect of minijet on hadron spectra and azimuthal anisotropy in heavy-ion collisions

    Lilin Zhu🇨🇳

    Here I review the transverse momentum distributions of identified hadrons produced in Au-Au collisions at RHIC and Pb-Pb collisions at LHC in the framework of recombination model. Minijets play an important role in generating shower partons in the intermediate region. At LHC, the resultant soft shower partons are even found to dominate over the thermal partons in the non-strange sector. The azimuthal anisotropy of the produced hadrons could also be explained as the consequence of the effects of minijets. Harmonic analysis of the dependence leads to that can be well produced without reference to flow.

    Comments:
    12 pages, 6 figures. arXiv admin note: text overlap with arXiv:1406.5733
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1606.09373 [pdf]
    0 citations
  3. 03

    [Submitted on 30 Jun 2016]

    Hadronic EDM and New physics beyond standard model

    Nodoka Yamanaka🇯🇵

    The nuclear electric dipole moment is a very sensitive probe of CP violation beyond the standard model, and for light nuclei, it can be evaluated accurately using the few-body calculational methods. In this talk, we present the result of the evaluation of the electric dipole moment of 3-body and 4-body systems using the Gaussian expansion method in the ab initio approach and in the cluster model. We also give the future prospects for the discovery of new physics beyond it within the sensitivity of prepared experiments.

    Comments:
    6 pages, 1 figure, proceeding of the 12th International Conference on Low Energy Antiproton Physics (LEAP2016), March 6-11, 2016
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1606.09587 [pdf]
    JPS Conf.Proc.(2017)·0 citations
  4. 04

    [Submitted on 30 Jun 2016]

    Hard Photodisintegration of 3He into pd pair

    Dhiraj Maheswari🇺🇸 · Misak M. Sargsian🇺🇸

    The recent measurements of high energy photodisintegration of the nucleus to the pair at center of mass demonstrated an energy scaling consistent with the quark counting rule with unprecedentedly large exponent of . To understand the underlying mechanism of this process we extended the theoretical formalism of hard rescattering mechanism to calculate the reaction. In HRM the incoming high energy photon strikes a quark from one of the nucleons in the target which subsequently undergoes hard rescattering with the quarks from the other nucleons generating hard two-body system in the final state of the reaction. Within the HRM we derived the parameter free expression for the differential cross section of the reaction, which is expressed through the transition spectral function, cross section of hard scattering and the effective charge of the quarks being interchanged during the hard rescattering process. The numerical estimates of all these factors resulted in the magnitude of the cross section which is surprisingly in a good agreement with the data.

    Comments:
    38 pages, 9 figures, 1 Table
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1606.09617 [pdf]
    PRC(2017)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE