Overview of pion-nucleus interaction at low energies

Details Overview of pion-nucleus interaction at low energies Overview of pion-nucleus interaction at low energies

2006-07-23

arxiv.org/abs/nucl-th/0607049v1

Int.J.Mod.Phys.A22:213-220,2007

Physics

Nuclear Physics

Nuclear Theory

8 pages, 4 figures, MESON2006 Workshop, to appear in Int. J. Modern Phys. A

Scientific paper

10.1142/S0217751X07035355

Predictions of the existence of well-defined deeply bound pionic atom states for heavy nuclei and the eventual observation of such states by the (d,3He) reaction have revived interest in the pion-nucleus interaction at threshold and in its relation to the corresponding pion-nucleon interaction. Explanation of the 'anomalous' s-wave repulsion in terms of partial restoration of chiral symmetry and/or in terms of energy-dependence effects have been tested in global fits to pionic atom data and in a recent dedicated elastic scattering experiment. The role of neutron density distributions in this context is discussed in detail for the first time.

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