Photoproduction of 0-200-MeV Pions from C 12 and Li </…
1979; American Physical Society; Volume: 43; Issue: 20 Linguagem: Inglês
10.1103/physrevlett.43.1476
ISSN1092-0145
AutoresMano Singham, G. N. Epstein, Frank Tabakin,
Tópico(s)Quantum Chromodynamics and Particle Interactions
ResumoTotal cross sections for $^{12}\mathrm{C}$($\ensuremath{\gamma}$,${\ensuremath{\pi}}^{\ensuremath{-}}$)$^{12}\mathrm{N}$ and $^{7}\mathrm{Li}$($\ensuremath{\gamma}$,${\ensuremath{\pi}}^{\ensuremath{-}}$)$^{7}\mathrm{Be}$ are evaluated in the impulse approximation, with use of the Blomqvist-Laget photoproduction operator and pion distorted waves. A peak at low energies and the falloff of the cross section with increasing energy are found to be consequences of the changing overlap of pion waves with nuclear transition densities.
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