Utility of antiproton-nucleus scattering for probing nuclear surface density distributions

Abstract

Antiproton-nucleon ($\bar{p}N$) total cross sections are typically 3-4 times larger than the $NN$ ones at incident energies from a few hundreds to thousands MeV. We investigate antiproton-nucleus scattering as it could work as a probe of the nuclear structure giving the sensitivity differently from a proton probe. High-energy antiproton-nucleus reactions are reasonably described by the Glauber model with a minimal profile function that reproduces the $\bar{p}N$ and $\bar{p}$-${}^{12}$C cross section data. In contrast to the proton-nucleus scattering, we find that the complete absorption occurs even beyond the nuclear radius due to the large $\bar{p}N$ elementary cross sections, which shows stronger sensitivity to the nuclear density distribution in the tail region. This sensitivity is quantified in the total reaction cross sections with various density profiles for future measurement including neutron-rich unstable nuclei.

9 pages, 9 figures, to appear in Phys. Rev. C

References in corpus (10)

• ${}^{22}$C: $S$-Wave Two-Neutron Halo
• Proton elastic scattering from tin isotopes at 295 MeV and systematic change of neutron density distributions
• A two-neutron halo is unveiled in ${}^{29}$F
• Formula for proton-nucleus reaction cross section at intermediate energies and its application
• Elastic and total reaction cross sections of oxygen isotopes in Glauber theory
• Exploring two-neutron halo formation in the ground-state of ${}^{29}$F within a three-body model
• The ${}^{29}$F nucleus as a lighthouse on the coast of the island of inversion
• Core swelling in spherical nuclei: An indication of the saturation of nuclear density
• Neutron-skin thickness determines the surface tension of a compressible nuclear droplet
• Complete Glauber calculations for proton-nucleus inelastic cross sections

Cited by in corpus (3)

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