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Nuclear Theory·nucl-th

Monday·April 23, 2018

8 papers—4 primary·4 cross-listed

All8Primary4Cross-lists4
  1. 01

    [Submitted on 19 Apr 2018]

    Neck configuration of Cm and Cf nuclei in the fission state within relativistic mean field formalism

    M. Bhuyan · B. V. Carlson · S. K. Patra · R. K. Gupta

    A correlation is established between the neutron multiplicity and the neutrons number in the fission state of Curium and Californium isotopes within a microscopic study using relativistic mean field formalism. The study includes the isotopes of Cm and Cf nuclei near the valley of stability, and hence is likely to play an important role in the artificial synthesis of superheavy nuclei. The static fission path, the neutronproton asymmetry, the evolution of the neck and their composition in terms of nucleon numbers are also estimated. We find a maximum ratio for average neutron to proton density, which is about in the breakdown of the liquiddrop picture for Cm and Cf. A strong dependence of the neutronproton asymmetry on the neutron multiplicity in an isotopic chain is also observed.

    Comments:
    09 Pages, 04 Figure and 03 Tables
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1804.07338 [pdf]
    PRC(2019)·2 citations
  2. 02

    [Submitted on 20 Apr 2018]

    Diffusion monte carlo calculations of three-body systems

    Mengjiao Lyu · Zhongzhou Ren · Qihu Lin

    Application of diffusion Monte Carlo algorithm in three-body systems is studied. We develop a program and use it to calculate the property of various three-body systems. Regular Coulomb systems such as atoms, molecules and ions are investigated. Calculation is then extended to exotic systems where electrons are replaced by muons. Some nuclei with neutron halos are also calculated as three-body systems consisting of a core and two external nucleons. Our results agree well with experiments and others' work.

    Comments:
    4 pages, 3 tables
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1804.07545 [pdf]
    CPC(2012)·1 citation
  3. 03

    [Submitted on 20 Apr 2018]

    Quasielastic charged-current neutrino scattering in the scaling model with relativistic effective mass

    I. Ruiz Simo🇪🇸 · V.L. Martinez-Consentino🇪🇸 · J.E. Amaro🇪🇸 · E. Ruiz Arriola🇪🇸

    We use a recent scaling analysis of the quasielastic electron scattering data from C to predict the quasielastic charge-changing neutrino scattering cross sections within an uncertainty band. We use a scaling function extracted from a selection of the cross section data, and an effective nucleon mass inspired by the relativistic mean-field model of nuclear matter. The corresponding super-scaling analysis with relativistic effective mass (SuSAM*) describes a large amount of the electron data lying inside a phenomenological quasielastic band. The effective mass incorporates the enhancement of the transverse current produced by the relativistic mean field. The scaling function incorporates nuclear effects beyond the impulse approximation, in particular meson-exchange currents and short range correlations producing tails in the scaling function. Besides its simplicity, this model describes the neutrino data as reasonably well as other more sophisticated nuclear models.

    Comments:
    16 pages, 12 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1804.07548 [pdf]
    PRD(2018)·23 citations
  4. 04

    [Submitted on 20 Apr 2018]

    Calculating hard probe radiative energy loss beyond soft-gluon approximation: Examining the approximation validity

    Bojana Blagojevic🇷🇸 · Magdalena Djordjevic🇷🇸 · Marko Djordjevic🇷🇸

    The soft-gluon approximation, which implies that radiated gluon carries away a small fraction of initial parton's energy, is a commonly used assumption in calculating radiative energy loss of high momentum partons traversing QGP created at RHIC and LHC. While soft-gluon approximation is convenient, different theoretical approaches reported significant radiative energy loss of high partons, thereby questioning its validity. To address this issue, we relaxed the soft-gluon approximation within DGLV formalism. The obtained analytical expressions are quite distinct compared to the soft-gluon case. However, numerical results for the first order in opacity fractional energy loss lead to small differences in predictions for the two cases. The difference in the predicted number of radiated gluons is also small. Moreover, the effect on these two variables has an opposite sign, which when combined results in almost overlapping suppression predictions. Therefore, our results imply that, contrary to the commonly held doubts, the soft-gluon approximation in practice works surprisingly well in DGLV formalism. Finally, we also discuss generalizing this relaxation in the dynamical QCD medium, which suggests a more general applicability of the conclusions obtained here.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1804.07593 [pdf]
    PRC(2019)·29 citations

Affiliations

first authorsco-authorsvia INSPIRE