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Nuclear Theory·nucl-th

Friday·March 20, 2015

10 papers—3 primary·7 cross-listed

All10Primary3Cross-lists7
  1. 01

    [Submitted on 18 Mar 2015]

    Interferometric signatures of the temperature dependence of the specific shear viscosity in heavy-ion collisions

    Christopher Plumberg🇺🇸 · Ulrich Heinz🇺🇸

    Recent work has shown that a temperature dependence of the shear viscosity to entropy ratio, , influences the collective flow pattern in heavy-ion collisions in characteristic ways that can be measured by studying hadron transverse momentum spectra and their anisotropies. Here we point out that it also affects the pair momentum dependence of the Hanbury-BrownTwiss (HBT) radii (the source size parameters extracted from two-particle intensity interferometry) and the variance of their event-by-event fluctuations. This observation establishes interferometric signatures as useful observables to complement the constraining power of single-particle spectra on the temperature dependence of .

    Comments:
    v2 - minor correction to Figure 6 and appropriate changes to relevant text v3 - improved calculations including p+p multiplicity fluctuations, implemented changes recommended by referee
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1503.05605 [pdf]
    PRC(2015)·14 citations
  2. 02

    [Submitted on 19 Mar 2015]

    Event simulations in a transport model for intermediate energy heavy ion collisions: Applications to multiplicity distributions

    S. Mallik · S. Das Gupta · G. Chaudhuri

    We perform transport model calculations for central collisions of mass 120 on mass 120 at laboratory beam energy in the range 20 MeV/nucleon to 200 MeV/nucleon. A simplified yet accurate method allows calculation of fluctuations in systems much larger than what was considered feasible in a well-known and already existing model. The calculations produce clusters. The distribution of clusters is remarkably similar to that obtained in equilibrium statistical model.

    Comments:
    6 pages, 5 figures, Accepted in Physical Review C
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1503.05840 [pdf]
    PRC(2015)·32 citations
  3. 03

    [Submitted on 19 Mar 2015]

    Uncertainty Quantification and Propagation in Nuclear Density Functional Theory

    N. Schunck · J.D. McDonnell · D. Higdon · J. Sarich · S.M. Wild

    Nuclear density functional theory (DFT) is one of the main theoretical tools used to study the properties of heavy and superheavy elements, or to describe the structure of nuclei far from stability. While on-going efforts seek to better root nuclear DFT in the theory of nuclear forces [see Duguet et al., this issue], energy functionals remain semi-phenomenological constructions that depend on a set of parameters adjusted to experimental data in finite nuclei. In this paper, we review recent efforts to quantify the related uncertainties, and propagate them to model predictions. In particular, we cover the topics of parameter estimation for inverse problems, statistical analysis of model uncertainties and Bayesian inference methods. Illustrative examples are taken from the literature.

    Comments:
    Proceedings of the "Second International Workshop on Perspectives on Nuclear Data for the Next Decade", 14-17 October 2014, Bruyères-le-Châtel, France
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1503.05894 [pdf]
    EPJA(2015)·29 citations

Affiliations

first authorsco-authorsvia INSPIRE