Core-excitation effects in pion double charge exchange

Kamal K. Seth*, M. Kaletka, S. Iversen, A. Saha, D. Barlow, D. Smith, L. C. Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Differential cross sections for the pion double-charge-exchange reaction Ca42(+,-)Ti42(g.s.) have been measured at lab=5°at several energies. For T(+)<200 MeV, (5°) are found to be more than an order of magnitude larger than those predicted by conventional double-charge-exchange calculations. It is shown that the observed enhancements can be explained in terms of coherent contributions due to terms proportional to 2(r) in the pion-nucleus potential whose importance is dramatically enhanced in the presence of large core-excitation components in Ca42(g.s.).

Original languageEnglish (US)
Pages (from-to)894-897
Number of pages4
JournalPhysical review letters
Volume52
Issue number11
DOIs
StatePublished - 1984

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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