Deeply bound 1s and 2p pionic states in 205Pb and determination of the s-wave part of the pion-nucleus interaction

H Geissel; H Gilg; A Gillitzer; R S Hayano; S Hirenzaki; K Itahashi; M Iwasaki; P Kienle; M Münch; G Münzenberg; W Schott; K Suzuki; D Tomono; H Weick; T Yamazaki; T Yoneyama

doi:10.1103/PhysRevLett.88.122301

Deeply bound 1s and 2p pionic states in 205Pb and determination of the s-wave part of the pion-nucleus interaction

Phys Rev Lett. 2002 Mar 25;88(12):122301. doi: 10.1103/PhysRevLett.88.122301. Epub 2002 Mar 11.

Authors

H Geissel¹, H Gilg, A Gillitzer, R S Hayano, S Hirenzaki, K Itahashi, M Iwasaki, P Kienle, M Münch, G Münzenberg, W Schott, K Suzuki, D Tomono, H Weick, T Yamazaki, T Yoneyama

Affiliation

¹ Gesellschaft für Schwerionenforschung, D-64291 Darmstadt, Germany.

PMID: 11909449
DOI: 10.1103/PhysRevLett.88.122301

Abstract

We observed well-separated 1s and 2p pi(-) states in 205Pb in the 206Pb(d,3He) reaction at T(d) = 604.3 MeV. The binding energies and the widths determined are B(1s) = 6.762+/-0.061 MeV, Gamma(1s) = 0.764(+0.154)(-0.171) MeV, B(2p) = 5.110+/-0.045 MeV, and Gamma(2p) = 0.321(-0.062)(+0.060) MeV. They are used to deduce the real and imaginary strengths of the s-wave part of the pion-nucleus interaction, which translates into a positive mass shift of pi(-) in 205Pb.