Electromagnetic structure of trinucleons

Marcucci, L. E.; Riska, D. O.; Schiavilla, R.

doi:10.1103/physrevc.58.3069

Cited by 79 publications

(134 citation statements)

References 55 publications

(130 reference statements)

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“…However, the three-body currents considered in Ref. [4] were not strictly consistent with the three-nucleon interaction (TNI) included in the Hamiltonian.…”

Section: Three-body Currentmentioning

confidence: 97%

“…[2,3], and the trinucleon form factors in Ref. [4]. Below, we briefly review those aspects of these earlier works that are more pertinent to the present study.…”

Section: Introductionmentioning

confidence: 94%

“…(2.9) (see following subsections), while the MD two-body current j MD ij (q) is purely transverse and therefore is un-constrained by the CCR. The latter will not be discussed any further in the present section; it suffices to say that it is taken to consist of the isoscalar ρπγ and isovector ωπγ transition currents, as well as of the isovector current associated with excitation of intermediate ∆ resonances [2][3][4].…”

Section: Two-body Currentmentioning

confidence: 99%

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Electromagnetic structure of A=2 and 3 nuclei and the nuclear current operator

et al. 2005

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Different models for conserved two-and three-body electromagnetic currents are constructed from two-and three-nucleon interactions, using either meson-exchange mechanisms or minimal substitution in the momentum dependence of these interactions. The connection between these two different schemes is elucidated. A number of low-energy electronuclear observables, including (i) np radiative capture at thermal neutron energies and deuteron photodisintegration at low energies, (ii) nd and pd radiative capture reactions, and (iii) isoscalar and isovector magnetic form factors of 3 H and 3 He, are calculated in order to make a comparative study of these models for the current operator. The realistic Argonne v18 two-nucleon and Urbana IX or Tucson-Melbourne three-nucleon interactions are taken as a case study. For A=3 processes, the bound and continuum wave functions, both below and above deuteron breakup threshold, are obtained with the correlated hyperspherical-harmonics method. Three-body currents give small but significant contributions to some of the polarization observables in the 2 H(p, γ) 3 He process and the 2 H(n, γ) 3 H cross section at thermal neutron energies. It is shown that the use of a current which did not exactly satisfy current conservation with the two-and three-nucleon interactions in the Hamiltonian was responsible for some of the discrepancies reported in previous studies between the experimental and theoretical polarization observables in pd radiative capture.

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“…However, the three-body currents considered in Ref. [4] were not strictly consistent with the three-nucleon interaction (TNI) included in the Hamiltonian.…”

Section: Three-body Currentmentioning

confidence: 97%

“…[2,3], and the trinucleon form factors in Ref. [4]. Below, we briefly review those aspects of these earlier works that are more pertinent to the present study.…”

Section: Introductionmentioning

confidence: 94%

Section: Two-body Currentmentioning

confidence: 99%

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Electromagnetic structure of A=2 and 3 nuclei and the nuclear current operator

et al. 2005

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“…Similarly, the Hanover group could describe the data very well with a single ∆-isobar admixture and including several selected relativistic corrections [67,120]. In [121] the first time threenucleon currents related to the 2π-exchange 3NF have been included. Also variational Monte Carlo techniques based on realistic NN and 3N forces have been successfully applied and similar results for the elastic form factors have been achieved [123].…”

Section: Comparison With Datamentioning

confidence: 99%

“…The magnetic form factors have been studied by other groups as well [67,120,121], where more sophisticated currents and ∆-admixtures have been included. This shifts theory much closer to the data, especially at the higher Q-values, which are not in the focus of this review.…”

Section: Comparison With Datamentioning

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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Three-Nucleon Electroweak Capture Reactions

Marcucci

Viviani

Kievsky

et al. 2003

Nuclear Dynamics: From Quarks to Nuclei

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Abstract. Recent advances in the study of the p−d radiative and µ− 3 He weak capture processes are presented and discussed. The three-nucleon bound and scattering states are obtained using the correlated-hyperspherical-harmonics method, with realistic Hamiltonians consisting of the Argonne v14 or Argonne v18 two-nucleon and Tucson-Melbourne or Urbana IX three-nucleon interactions. The electromagnetic and weak transition operators include one-and two-body contributions. The theoretical accuracy achieved in these calculations allows for interesting comparisons with experimental data.

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Electromagnetic structure of trinucleons

Cited by 79 publications

References 55 publications

Electromagnetic structure of A=2 and 3 nuclei and the nuclear current operator

Electromagnetic structure of A=2 and 3 nuclei and the nuclear current operator

Electron and photon scattering on three-nucleon bound states

Three-Nucleon Electroweak Capture Reactions

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