Extraction of neutron densities from elastic proton scattering by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Pb</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>2</mml:mn><mml:mn>0</mml:mn><mml:mn>6</mml:mn><mml:mo>,</mml:mo><mml:mn>2</mml:mn><mml:mn>0</mml:mn><mml:mn>7</mml:mn><mml:mo>,</mml:mo><mml:mn>2</mml:mn><mml:mn>0</mml:mn><mml:mn>8</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mm

Starodubsky, V.E.; Hintz, Norton M.

doi:10.1103/physrevc.49.2118

Cited by 146 publications

(174 citation statements)

References 52 publications

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“…6. Results obtained with the FKVW interaction are compared with data [62] for the Sn isotopes, and with the empirical value of r n − r p in 208 P b (0.20 ± 0.04 fm from proton scattering data [63], and 0.19 ± 0.09 fm from the excitation of the isovector giant dipole resonance by α-scattering [64]). …”

Section: Spherical Nucleimentioning

confidence: 99%

Relativistic nuclear energy density functional constrained by low-energy QCD

et al. 2006

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A relativistic nuclear energy density functional is developed, guided by two important features that establish connections with chiral dynamics and the symmetry breaking pattern of low-energy QCD: a) strong scalar and vector fields related to inmedium changes of QCD vacuum condensates; b) the long-and intermediate-range interactions generated by one-and two-pion exchange, derived from in-medium chiral perturbation theory, with explicit inclusion of ∆(1232) excitations. Applications are presented for binding energies, radii of proton and neutron distributions and other observables over a wide range of spherical and deformed nuclei from 16 O to 210 P o. Isotopic chains of Sn and P b nuclei are studied as test cases for the isospin dependence of the underlying interactions. The results are at the same level of quantitative comparison with data as the best phenomenological relativistic mean-field models.

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Section: Spherical Nucleimentioning

confidence: 99%

Relativistic nuclear energy density functional constrained by low-energy QCD

et al. 2006

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“…In particular, he has shown that there is a very strong linear correlation between the neutron skin thickness in 208 Pb and the individual parameters that determine the asymmetry energy S 2 (ρ): a 4 , p 0 and ∆K 0 . The empirical value of the difference between neutron and proton rms radii r n − r p in 208 Pb (0.20 ± 0.04 fm from proton scattering data [34], and 0.19 ± 0.09 fm from the alpha scattering excitation of the isovector giant dipole resonance [35]) places the following constraints In Fig. 4 we plot the asymmetry energy S 2 (ρ) as function of the baryon density for the three steps of our calculation of the nuclear matter EOS: first, using only chiral one-and two-pion exchange calculated in CHPT, next with the inclusion of leading order isoscalar condensate background nucleon self-energies that arise through changes in the quark condensate and the quark density at finite baryon density, and finally with the non-linear contribution δG (1) V to the vector condensate nucleon self-energy.…”

Section: Asymmetric Nuclear Mattermentioning

confidence: 99%

Relativistic nuclear model with point-couplings constrained by QCD and chiral symmetry

et al. 2004

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We derive a microscopic relativistic point-coupling model of nuclear many-body dynamics constrained by in-medium QCD sum rules and chiral symmetry. The effective Lagrangian is characterized by density dependent coupling strengths, determined by chiral one-and two-pion exchange and by QCD sum rule constraints for the large isoscalar nucleon self-energies that arise through changes of the quark condensate and the quark density at finite baryon density. This approach is tested in the analysis of the equations of state for symmetric and asymmetric nuclear matter, and of bulk and single-nucleon properties of finite nuclei. In comparison with purely phenomenological mean-field approaches, the built-in QCD constraints and the explicit treatment of pion exchange restrict the freedom in adjusting parameters and functional forms of density dependent couplings. It is shown that chiral (two-pion exchange) fluctuations play a prominent role for nuclear binding and saturation, whereas strong scalar and vector fields of about equal magnitude and opposite sign, induced by changes of the QCD vacuum in the presence of baryonic matter, generate the large effective spin-orbit potential in finite nuclei.

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“…The rms radius of neutron densities in nuclei has been measured with hadronic probes such as proton-nucleus elastic scattering [42][43][44][45] or inelastic scattering excitation of the giant dipole and spin-dipole resonances [46,47]. Antiprotonic atoms are helpful to probe the size of the neutron skin of nuclei from the fact that the nuclear periphery is very sensitive to antiprotons in the normally electronic shell.…”

Section: Introductionmentioning

confidence: 99%

Neutron skin thickness in the droplet model with surface width dependence: Indications of softness of the nuclear symmetry energy

et al. 2009

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We analyze the neutron skin thickness in finite nuclei with the droplet model and effective nuclear interactions. The ratio of the bulk symmetry energy J to the so-called surface stiffness coefficient Q has in the droplet model a prominent role in driving the size of neutron skins. We present a correlation between the density derivative of the nuclear symmetry energy at saturation and the J /Q ratio. We emphasize the role of the surface widths of the neutron and proton density profiles in the calculation of the neutron skin thickness when one uses realistic mean-field effective interactions. Next, taking as experimental baseline the neutron skin sizes measured in 26 antiprotonic atoms along the mass table, we explore constraints arising from neutron skins on the value of the J /Q ratio. The results favor a relatively soft symmetry energy at subsaturation densities. Our predictions are compared with the recent constraints derived from other experimental observables. Though the various extractions predict different ranges of values, one finds a narrow window L ∼ 45-75 MeV for the coefficient L that characterizes the density derivative of the symmetry energy that is compatible with all the different empirical indications.

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Extraction of neutron densities from elastic proton scattering byPb206,207,208

Cited by 146 publications

References 52 publications

Relativistic nuclear energy density functional constrained by low-energy QCD

Relativistic nuclear energy density functional constrained by low-energy QCD

Relativistic nuclear model with point-couplings constrained by QCD and chiral symmetry

Neutron skin thickness in the droplet model with surface width dependence: Indications of softness of the nuclear symmetry energy

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