On the determination of the pion effective mass in nuclei from pionic atoms

Details On the determination of the pion effective mass in nuclei from pionic atoms On the determination of the pion effective mass in nuclei from pionic atoms

1998-05-03

arxiv.org/abs/nucl-th/9805004v1

Phys.Lett. B432 (1998) 235-240

Physics

Nuclear Physics

Nuclear Theory

8 pages, Revtex, 2 figures, accepted by Physics Letters B

Scientific paper

10.1016/S0370-2693(98)00655-8

The binding energies of the deeply bound 1s and 2p states in pionic atoms of $^{207}$Pb, recently established experimentally in the $^{208}$Pb(d,$^3$He) reaction, have been used by several groups to derive the pion effective mass in nuclear matter. We show that these binding energies are fully consistent with `normal' pionic atoms and that the real part of the pion-nucleus potential at the center of $^{207}$Pb is 28$\pm$3 MeV and not 20 MeV as suggested previously.

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