Tübingen 2003 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 44: Elektromagnetische und hadronische Proben VII

HK 44.6: Talk

Thursday, March 20, 2003, 18:15–18:30, B

Deeply bound pionic states in Sn isotopes — •A. Gillitzer¹, M. Fujita², H. Geissel³, H. Gilg⁴, R.S. Hayano⁵, S. Hirenzaki², K. Itahashi⁶, M. Iwasaki⁷, P. Kienle^4,8, L. Maier⁴, M. Matos³, G. Münzenberg³, T. Ohtsubo⁹, M. Sato⁷, M. Shindo⁵, K. Suzuki⁵, T. Suzuki⁵, H. Weick³, M. Winkler³, T. Yamazaki¹⁰, and T. Yoneyama⁷ — ¹IKP, Forschungszentrum Jülich — ²Nara Women’s University — ³GSI Darmstadt — ⁴Technische Universität München — ⁵University of Tokyo — ⁶Muon Science Lab., RIKEN — ⁷Tokyo Institute of Technology — ⁸IMEP Austrian Academy of Sciences, Vienna — ⁹Niigata University — ¹⁰RI Beam Science Lab., RIKEN

Recently the pionic (d,³He) ransfer reaction on ^{112,116,120,124}Sn targets was studied at the GSI Fragment Separator. The deeply bound pionic 1s state was observed in the Sn isotopes 115,119, and 123. The data analysis has now been completed[1]. The measured binding energies and widths will be discussed in terms of medium effects on the pion-nucleon interaction and its relation to the partial restoration of chiral symmetry in nuclear matter.

[1] K. Suzuki et al., submitted to Phys. Rev. Lett.