Electromagnetic meson-exchange currents at the nucleon mass scale

Mathiot, J.-F.

doi:10.1016/0370-1573(89)90079-3

Cited by 101 publications

(80 citation statements)

References 170 publications

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“…The nucleons feel therefore direct effects of the other nucleons as well as of the hyperons in the environment, whereas for the hyperons there are only nucleonic contributions, because of the missing hyperon-hyperon potentials. The equations (13)(14)(15)(16) define the BHF scheme with the continuous choice of the single-particle energies. Due to the occurrence of U N and U Y in Eq.…”

Section: Neutron Star Structurementioning

confidence: 99%

Microscopic Theory of the Nuclear Equation of State and Neutron Star Structure

Baldo¹,

Burgio²

2001

Lecture Notes in Physics

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Abstract. The Bethe-Brueckner-Goldstone many-body theory of the Nuclear Equation of State is reviewed in some details. In the theory, one performs an expansion in terms of the Brueckner two-body scattering matrix and an ordering of the corresponding many-body diagrams according to the number of their hole-lines. Recent results are reported, both for symmetric and for pure neutron matter, based on realistic twonucleon interactions. It is shown that there is strong evidence of convergence in the expansion. Once three-body forces are introduced, the phenomenological saturation point is reproduced and the theory is applied to the study of neutron star properties. One finds that in the interior of neutron stars the onset of hyperons strongly softens the Nuclear Equation of State. As a consequence, the maximum mass of neutron stars turns out to be at the lower limit of the present phenomenological observation.

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Section: Neutron Star Structurementioning

confidence: 99%

Microscopic Theory of the Nuclear Equation of State and Neutron Star Structure

Baldo¹,

Burgio²

2001

Lecture Notes in Physics

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“…The directions of these momenta correspond to the direction of the momentap i finally observed in the detector. The modulus of these vectors p i is determined in such a way that the single-particle energies of the nucleons inside nuclear matter, calculated according to (4) coincide with the free energies of the nucleons moving with momenta˜ p i . In this way, we account for the retardation of the outgoing nucleons in the mean field of the remaining nucleus.…”

Section: The Cross Section and The Nuclear Currentmentioning

confidence: 99%

“…between the nucleon-nucleon pair. The corresponding current operators can be derived either by minimal coupling or via the continuity equation using meson exchange potentials [4,5].…”

Section: B Meson Exchange Currentsmentioning

confidence: 99%

Nucleon-nucleon correlations and two-nucleon currents in exclusive(e,e′NN)reactions

2000

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The contributions of short-range nucleon-nucleon (NN) correlations, various meson exchange current (MEC) terms and the influence of ∆ isobar excitations (isobaric currents, IC) on exclusive two-nucleon knockout reactions induced by electron scattering are investigated. The nuclear structure functions are evaluated for nuclear matter. Realistic NN interactions derived in the framework of One-Boson-Exchange model are employed to evaluate the effects of correlations and MEC in a consistent way. The correlations correlations are determined by solving the Bethe-Goldstone equation. This yields significant contributions to the structure functions WL and WT of the (e, e pn) and (e, e pp) reactions. These contributions compete with MEC corrections originating from the π and ρ exchange terms of the same interaction. Special attention is paid to the so-called 'super parallel' kinematics at momentum transfers which can be measured e.g. at MAMI in Mainz.PACS numbers: 25.30.Rw, 21.65.+f

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“…Elastic electron scattering on 3 He ( 3 H) has been reviewed many times over the years [22][23][24][25][26]. The inclusive process 3 He(e, e ′ ) has been reviewed in [26].…”

Section: Introductionmentioning

confidence: 99%

Electron and photon scattering on three-nucleon bound states

et al. 2005

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A big spectrum of processes induced by real and virtual photons on the 3 He and 3 H nuclei is theoretically investigated through many examples based on nonrelativistic Faddeev calculations for bound and continuum states. The modern nucleon-nucleon potential AV18 together with the threenucleon force UrbanaIX is used. The single nucleon current is augmented by explicit π-and ρ-like two-body currents which fulfill the current continuity equation together with the corresponding parts of the AV18 potential. We also employ the Siegert theorem, which induces many-body contributions to the current operator. The interplay of these different dynamical ingredients in the various electromagnetic processes is studied and the theory is compared to the experimental data.Overall we find fair to good agreement but also cases of strong disagreement between theory and experiment, which calls for improved dynamics. In several cases we refer the reader to the work of other groups and compare their results with ours. In addition we list a number of predictions for observables in different processes which would challenge this dynamical scenario even more stringently and systematically.

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Electromagnetic meson-exchange currents at the nucleon mass scale

Cited by 101 publications

References 170 publications

Microscopic Theory of the Nuclear Equation of State and Neutron Star Structure

Microscopic Theory of the Nuclear Equation of State and Neutron Star Structure

Nucleon-nucleon correlations and two-nucleon currents in exclusive(e,e′NN)reactions

Electron and photon scattering on three-nucleon bound states

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