Two-body pion absorption on He3 at threshold

Phys. Rev. C 50, 2703 – Published 1 December 1994
L. L. Kiang, T.-S. H. Lee, and D. O. Riska


It is shown that a drastic reduction of the ratio of the rates of the reactions He3(π-,nn) and He3(π-,np) for stopped pions is obtained once the effect of the short range two-nucleon components of the axial charge operator for the nuclear system is taken into account. In a calculation using simple wave functions but employing realistic models for the nucleon-nucleon interaction in the construction of these components of the axial charge operator, the predicted ratios can be brought to within 10–20 % of the empirical value.


  • Received 4 May 1994
  • Published in the issue dated December 1994

© 1994 The American Physical Society

Authors & Affiliations

L. L. Kiang

  • Department of Physics, National Tsing-Hua University, Hsinchu, Taiwan, Republic of China

T.-S. H. Lee

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

D. O. Riska

  • Department of Physics, University of Helsinki, Helsinki 00014, Finland

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