Realistic two-baryon potential coupling two-nucleon and nucleon-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Δ</mml:mi></mml:math>-isobar states: Fit and applications to three-nucleon system

Deltuva, A.; Machleidt, R.; Sauer, P. U.

doi:10.1103/physrevc.68.024005

Cited by 184 publications

(229 citation statements)

References 29 publications

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“…As expected, the ∆-isobar effect on polarization observables is more significant than on the differential cross sections, which confirms previous findings [13]. Experimental data for three-body photodisintegration of 3 He are very scarce; we therefore show in Fig.…”

Section: A Proton-deuteron Breakupsupporting

confidence: 77%

Publisher's Note: Momentum-space description of three-nucleon breakup reactions including the Coulomb interaction [Phys. Rev. C 72, 054004 (2005)]

Deltuva¹,

Fonseca²,

Sauer³

2005

Phys. Rev. C

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The Coulomb interaction between the two protons is included in the calculation of proton-deuteron breakup and of three-body electromagnetic disintegration of 3 He. The hadron dynamics is based on the purely nucleonic charge-dependent (CD) Bonn potential and its realistic extension CD Bonn + ∆ to a coupled-channel two-baryon potential, allowing for single virtual ∆-isobar excitation. Calculations are done using integral equations in momentum space. The screening and renormalization approach is employed for including the Coulomb interaction. Convergence of the procedure is found at moderate screening radii. The reliability of the method is demonstrated. The Coulomb effect on breakup observables is seen at all energies in particular kinematic regimes.

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Section: A Proton-deuteron Breakupsupporting

confidence: 77%

Publisher's Note: Momentum-space description of three-nucleon breakup reactions including the Coulomb interaction [Phys. Rev. C 72, 054004 (2005)]

Deltuva¹,

Fonseca²,

Sauer³

2005

Phys. Rev. C

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113

276

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“…Alternatively, 3NF can be generated by an explicit treatment of the isobar excitation within the coupled channel (CC) method [3]. For the 3N system, creation of a -containing state yields an effective 3NF but also two-barion dispersion.…”

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confidence: 99%

Vector analyzing powers of deuteron-proton elastic scattering and breakup at 130 MeV

et al. 2012

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Set of vector analyzing power data of the dp elastic scattering and 1 H ( d,pp)n breakup reactions at 130-MeV deuteron beam energy has been measured in the domain of very forward polar angles. The results are compared with theoretical predictions originating from various approaches: realistic nucleon-nucleon (NN) potentials and the NN potentials combined with a three-nucleon force (3NF) model and with predictions based on the ChPT framework. In case of the breakup process, none of the theoretical calculations reveal sensitivity to any of the dynamical effects such as 3NF or Coulomb interaction and they describe the experimental data equally well. For the elastic scattering, the Coulomb correction appears not negligible at very small θ c.m.d . The effect seems to be confirmed by the data. Few-nucleon systems are microscopic laboratories most suited for detailed study of the nucleon-nucleon (NN) interaction dynamics and the nuclear forces. Among them, the system composed of three nucleons (3N) is the simplest nontrivial environment where NN force models can be tested. Properties of 3N systems at medium energies are mainly determined by pairwise NN interaction. There are, however, reasons to assume the existence of additional dynamical effects like three-nucleon force (3NF) related to the presence of the third nucleon, or the Coulomb interaction, very significant in the domain of small polar angles of the emitted protons. Both effects are modeled within different theoretical formalisms.The realistic two-nucleon (2N) forces can be combined with the recent version of the 2π -exchange Tucson-Melbourne (TM) 3NF [1] or in the case of AV18 NN force with the Urbana IX 3NF [2]. Alternatively, 3NF can be generated by an explicit treatment of the isobar excitation within the coupled channel (CC) method [3]. For the 3N system, creation of a -containing state yields an effective 3NF but also two-barion dispersion. These two effects usually compete, and therefore * izabela.ciepal@uj.edu.pl the net effects of including the isobar in the potential are smaller than for approaches with the phenomenological 3NF's. When the chiral perturbation theory (ChPT) is used at the next-to-next-to-leading order (NNLO), the 3N contributions arise naturally, fully consistently with the NN force terms [4].The long-range electromagnetic component of the NN interaction was successfully implemented in CC formalism [5,6] as well as in the calculations [7] based on the AV18 NN potential combined with the Urbana IX 3NF.Besides the binding energies of the light nuclei, the importance of the 3NF was experimentally confirmed on the basis of the data originating from the nucleon-deuteron elastic scattering process [8][9][10][11][12][13][14][15][16][17]. In general, inclusion of the 3NF component improves the description of the cross-sectional data. However, quite significant discrepancies between the theoretical models and polarization observables are still present. Exploration of the nucleon-deuteron breakup can be considered as a natural next step in the...

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“…[16,[26][27][28]. We use several realistic interaction models, i.e., the charge-dependent Bonn potential (CD Bonn) [29], its coupled-channel extension CD Bonn + Δ [30], and the inside-nonlocal outside-Yukawa (INOY04) potential by Doleschall [6,31]. The latter yields nearly the experimental value for the 3 He and 3 H binding energy without an additional three-nucleon force.…”

Section: Results and Summarymentioning

confidence: 99%

Reactions in the four-nucleon system above breakup threshold

Deltuva

Fonseca

2016

EPJ Web of Conferences

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Abstract. Microscopic calculations of four-body scattering become very challenging in the energy regime above the threshold for four free particles. We consider mixed-isospin four-nucleon reactions initiated by the proton-3 H, neutron-3 He, or deuteron-deuteron collisions. We solve the Alt, Grassberger, and Sandhas equations for the four-nucleon transition operators in the momentum-space framework. The complex-energy method with special integration weights is applied to deal with the complicated singularities in the kernel of AGS equations. Results for the differential cross section and spin observables in elastic, charge-exchange, transfer, and breakup reactions using realistic potentials are presented.

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Realistic two-baryon potential coupling two-nucleon and nucleon-Δ-isobar states: Fit and applications to three-nucleon system

Cited by 184 publications

References 29 publications

Publisher's Note: Momentum-space description of three-nucleon breakup reactions including the Coulomb interaction [Phys. Rev. C 72, 054004 (2005)]

Publisher's Note: Momentum-space description of three-nucleon breakup reactions including the Coulomb interaction [Phys. Rev. C 72, 054004 (2005)]

Vector analyzing powers of deuteron-proton elastic scattering and breakup at 130 MeV

Reactions in the four-nucleon system above breakup threshold

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