PaperPanorama
FAQ

Nuclear Theory·nucl-th

Friday·September 29, 2017

8 papers—3 primary·5 cross-listed

All8Primary3Cross-lists5
  1. 01

    [Submitted on 28 Sept 2017]

    Many body effects in nuclear matter QCD sum rules

    E. G. Drukarev🇷🇺 · M. G. Ryskin🇷🇺 · V. A. Sadovnikova🇷🇺

    We calculate the single-particle nucleon characteristics in symmetric nuclear matter with inclusion of the 3N and 4N interactions. We calculated the contribution of the 3N interactions earlier, now we add that of the 4N ones. The contribution of the 4N forces to nucleon self energies is expressed in terms of the nonlocal scalar condensate (d=3) and of the configurations of the vector-scalar and the scalar-scalar quark condensates (d=6) in which two diquark operators act on two different nucleons of the matter.These four-quark condensates are obtained in the model-independent way. The density dependence of the nucleon effective mass, of the vector self energy and of the single-particle potential energy are obtained. We traced the dependence of the nucleon characteristics on the actual value of the pion-nucleon sigma term. We obtained also the nucleon characteristics in terms of the quasifree nucleons, with the noninteracting nucleons surrounded by their pion clouds as the starting point. This approach leads to strict hierarchy of the many body forces.

    Comments:
    16 pages, 6 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1709.09837 [pdf]
    NPA(2017)·5 citations
  2. 02

    [Submitted on 28 Sept 2017]

    From (e,e'p) to Neutrino Scattering

    Carlotta Giusti🇮🇹

    Since a long time electron scattering has been envisaged as a powerful and preferential tool to investigate nuclear properties. In particular, the (e,e'p) knockout reaction has provided a wealth of information on the single particle (s.p.) aspects of nuclear structure, on the validity and the limit of the independent particle shell model. The work done for electron scattering is extremely useful also for the analysis and the interpretation of neutrino oscillation experiments, where nuclei are used as neutrino detectors and it is crucial that nuclear effects in neutrino-nucleus interactions are well under control. In this contribution it is discussed if and how the work done for (e,e'p) can be exploited for the analysis of neutrino-nucleus scattering data.

    Comments:
    20 pages, 4 figures. Talk given at the "International Workshop on (e,e'p) Processes", July 2-6, 2017, Bled, Slovenia
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1709.10014 [pdf]
    0 citations
  3. 03

    [Submitted on 28 Sept 2017]

    Modeling baryonic interactions with the Clausius-type equation of state

    Volodymyr Vovchenko🇩🇪 · Mark I. Gorenstein🇩🇪 · Horst Stoecker🇩🇪

    The quantum statistical Clausius-based equation of state is used to describe the system of interacting nucleons. The interaction parameters , , and of the model are fixed by the empirically known nuclear ground state properties and nuclear incompressibility modulus. The model is generalized to describe the baryon-baryon interactions in the hadron resonance gas (HRG). The predictions of such a Clausius-HRG model are confronted with the lattice QCD data at zero and at small chemical potentials, and are also contrasted with the standard van der Waals approach. It is found that the behavior of the lattice QCD observables in a high-temperature hadron gas is sensitive to the nuclear matter properties. An improved description of the nuclear incompressibility factor correlates with an improved description of the lattice QCD data in the crossover transition region.

    Comments:
    8 pages, 3 figures, submitted to EPJ A Topical Issue on "Frontiers in nuclear, heavy ion and strong field physics" dedicated to Walter Greiner
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1709.10097 [pdf]
    EPJA(2018)·9 citations

Affiliations

first authorsco-authorsvia INSPIRE