A Theory of low-energy pion double charge exchange
19944 pages
Published in:
- Phys.Rev.Lett. 73 (1994) 38-41
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Abstract: (APS)
We propose a theory of sequential charge exchange that describes, for the first time, the general features of the excitation function and the angular distributions of charge exchange on a C14 target to the isobaric and double isobaric analog states for pion kinetic energies up to 80 MeV. Our theory consists of conventional coupled-channel scattering through important low-lying states. We conclude that exotic contributions to the double charge exchange process must make a relatively small contribution (less than a factor of 2), effectively ruling out a prominent role for dibaryon resonances recently suggested as an explanation for the data.- pi+ nucleus: nuclear reaction
- carbon: nuclide
- charge exchange: multiple
- multiple: charge exchange
- angular distribution
- channel cross section: energy dependence
- coupled channel
- pi+ carbon-14 --> oxygen-14 pi-
- < 0.08
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