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Nuclear Theory·nucl-th

Monday·November 6, 2017

6 papers—4 primary·2 cross-listed

All6Primary4Cross-lists2
  1. 01

    [Submitted on 3 Nov 2017]

    Evaluation of the hyperon binding energy via statistical production of hypernuclei

    A.S. Botvina · M. Bleicher · N. Buyukcizmeci

    In nuclear reactions of high energy one can simultaneously produce a lot of hypernuclei after the capture of hyperons by nuclear residues. We consider statistical disintegration of such hypernuclear systems and the connection of fragment production with the binding energies of hyperons. It is demonstrated that the hyperon binding energies can be effectively evaluated from the yields of different isotopes of hypernuclei. The double ratio method is suggested for this purpose. The advantage of this procedure is its universality and the possibility to involve many different isotopes. This method can also be applied for multi-strange nuclei, which binding energies were very difficult to measure in previous hypernuclear experiments.

    Comments:
    10 pages, submitted to Jour. Phys. G:Nuclear and Particle Physics
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1711.01159 [pdf]
    PRC(2018)·16 citations
  2. 02

    [Submitted on 3 Nov 2017]

    Bootstrap technique to study correlation between neutron skin thickness and the slope of symmetry energy in atomic nuclei

    D. Muir · A. Pastore · J. Dobaczewski · C. Barton

    We present a new statistical tool based on random sampling to assess the confidence interval of Pearson's and Spearman's correlation coefficients. These estimators are then used to quantify the statistical correlations among the neutron skin thickness of atomic nuclei and the slope of the symmetry energy in the infinite nuclear medium.

    Comments:
    Presented at the XXXV Mazurian Lakes Conference on Physics, Piaski, Poland, September 3-9, 2017
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1711.01190 [pdf]
    Acta Phys.Polon.B(2018)·3 citations
  3. 03

    [Submitted on 3 Nov 2017]

    The deuteron-radius puzzle is alive: A new analysis of nuclear structure uncertainties

    Oscar Javier Hernandez🇩🇪 · Andreas Ekström🇸🇪 · Nir Nevo Dinur🇨🇦 · Chen Ji🇨🇳 · Sonia Bacca🇩🇪 · Nir Barnea🇮🇱

    To shed light on the deuteron radius puzzle we analyze the theoretical uncertainties of the nuclear structure corrections to the Lamb shift in muonic deuterium. We find that the discrepancy between the calculated two-photon exchange correction and the corresponding experimentally inferred value by Pohl et al. [1] remain. The present result is consistent with our previous estimate, although the discrepancy is reduced from 2.6 to 2 . The error analysis includes statistic as well as systematic uncertainties stemming from the use of nucleon-nucleon interactions derived from chiral effective field theory at various orders. We therefore conclude that nuclear theory uncertainty is more likely not the source of the discrepancy.

    Comments:
    updated according to referee's comments
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1711.01199 [pdf]
    PLB(2018)·41 citations
  4. 04

    [Submitted on 3 Nov 2017]

    Transverse Asymmetry in Nucleon Deuteron Scattering in Pionless Effective Field Theory

    Arman Margaryan🇺🇸

    In this dissertation we apply the pionless effective field theory to low energy neutron deuteron elastic scattering process. We calculated some of the polarization observables in neutron deuteron scattering to next-to-next-to-next-to-leading-order, in particular the transverse asymmetry . All of the previous calculations have the same characteristic feature of under-predicting this observable, this is known as the -puzzle. At this order of the pionless EFT new two-body -wave interaction terms enter into the Lagrangian. This interaction terms give crucial contributions to the observable. By varying the interaction coefficients within the allowed error estimates of the pionless EFT we find results that at this order are consistent with the experimental data. Our conclusion is that the -puzzle is likely to be solved within the next few orders of the \EFT. Other observables in neutron-deuteron scattering process are also calculated and are in good agreement with the experimental data.

    Comments:
    Phd Thesis, Duke Univ (2017)
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1711.01245 [pdf]
    1 citation

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