PaperPanorama
FAQ

Nuclear Theory·nucl-th

Wednesday·April 22, 2015

7 papers—3 primary·4 cross-listed

All7Primary3Cross-lists4
  1. 01

    [Submitted on 20 Apr 2015]

    Ab Initio Approach to the Non-Perturbative Scalar Yukawa Model

    Yang Li🇺🇸 · V. A. Karmanov🇷🇺 · P. Maris🇺🇸 · J. P. Vary🇺🇸

    We report on the first non-perturbative calculation of the scalar Yukawa model in the single-nucleon sector up to four-body Fock sector truncation (one "scalar nucleon" and three "scalar pions"). The light-front Hamiltonian approach with a systematic non-perturbative renormalization is applied. We study the -body norms and the electromagnetic form factor. We find that the one- and two-body contributions dominate up to coupling . As we approach the coupling , we discover that the four-body contribution rises rapidly and overtakes the two- and three-body contributions. By comparing with lower sector truncations, we show that the form factor converges with respect to the Fock sector expansion.

    Comments:
    8 pages, 12 figures, to be published in Phys. Lett. B
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Theory (hep-th)
    arXiv:
    1504.05233 [pdf]
    PLB(2015)·35 citations
  2. 02

    [Submitted on 21 Apr 2015]

    Well funneled nuclear structure landscape: renormalization

    A. Idini · G. Potel · F. Barranco · E. Vigezzi · R. A. Broglia

    A complete characterization of the structure of nuclei can be obtained by combining information arising from inelastic scattering, Coulomb excitation and decay, together with one- and two-particle transfer reactions. In this way it is possible to probe the single-particle and collective components of the nuclear many-body wavefunction resulting from their mutual coupling and diagonalising the low-energy Hamiltonian. We address the question of how accurately such a description can account for experimental observations. It is concluded that renormalizing empirically and on equal footing bare single-particle and collective motion in terms of self-energy (mass) and vertex corrections (screening), as well as particle-hole and pairing interactions through particle-vibration coupling allows theory to provide an overall, quantitative account of the data.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1504.05335 [pdf]
    PRC(2015)·29 citations
  3. 03

    [Submitted on 21 Apr 2015]

    Measured difference between 206Pb, 205Tl charge distributions and the proton 3s1/2 wave function

    M. R. Anders · S. Shlomo · I. Talmi

    Charge density difference between 206Pb and 205Tl, measured by elastic electron scattering, is very similar to the charge density due to a proton in a 3s1/2 orbit. We look for a potential well whose 3s1/2 wave function yields the measured data. We developed a novel method to obtain the potential directly from the density and its first and second derivatives. Fits to parametrized potentials were also carried out. The 3s1/2 wave functions of the potentials determined here, reproduce fairly well the experimental data within the quoted errors. To detect possible effects of short-range two-body correlations on the 3s1/2 shell model wave function, more accurate measurements are required.

    Comments:
    16 pages (double spaced), 4 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1504.05507 [pdf]
    3 citations

Affiliations

first authorsco-authorsvia INSPIRE