Antiproton-nucleus potentials from global fits to antiprotonic X-rays and radiochemical data

Details Antiproton-nucleus potentials from global fits to antiprotonic X-rays and radiochemical data Antiproton-nucleus potentials from global fits to antiprotonic X-rays and radiochemical data

2005-04-11

arxiv.org/abs/nucl-th/0504030v2

Nucl.Phys. A761 (2005) 283-295

Physics

Nuclear Physics

Nuclear Theory

18 pages, 6 figures, one table. Extended discussion, to appear in Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2005.08.001

We report on global fits of optical-model parameters to 90 data points for $\bar p$ X-rays and 17 data points of radiochemical data put together. With the help of separate fits to the two kinds of data it is possible to determine phenomenologically the radial region where the absorption of antiprotons takes place and to obtain neutron densities which represent the average behaviour over the periodic table. A finite-range attractive and absorptive $\bar p$-nuclear isoscalar potential fits the data well. Self-consistent dynamical calculations within the RMF model demonstrate that the polarization of the nucleus by the {\it atomic} antiproton is negligible.

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