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Isospin Dependence of s-wave Pion Absorption in the A=3 Nuclei

Carl Werntz

H. S. Valk

  • The Catholic University of America, Washington, D.C. 20064

  • Georgia Institute of Technology, Atlanta, Georgia 30332

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Phys. Rev. Lett. 54, 2321 – Published 27 May, 1985

DOI: https://doi.org/10.1103/PhysRevLett.54.2321

Abstract

On the basis of microscopic models for s-wave pion absorption on nucleon pairs the contribution of T=1 pairs compared to T=0 pairs should be strongly suppressed. A direct consequence, not previously noted, is that the 1s absorption widths in the pionic atoms H3 and He3 should be equal, aside from renormalization due to the different π−-atomic wave-function length scales. The H3 width, which is not directly observable, is thus predicted to be 2.25 ± 0.55 eV. It is shown that this value is consistent with observed branching ratios for radiative capture in the mirror pair.

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Phys. Rev. Lett. 54, 2321– Published 27 May, 1985
  • Received 26 December 1984

© 1985 American Physical Society

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