Indications of partial chiral symmetry restoration from pionic atoms |
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Affiliation: | Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel |
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Abstract: | Extensive data on strong interaction effects in pionic atoms are analyzed with a density-dependent isovector scattering amplitude suggested recently by Weise to result from a density dependence of the pion decay constant. Most of the so-called ‘missing s-wave repulsion’ is removed when adopting this approach, thus indicating a partial chiral symmetry restoration in dense matter. The resulting potentials describe quite well also elastic scattering of 20 MeV pions on Ca. Further tests with elastic scattering are desirable. |
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