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S. Gilad; S. Høibråten; W. J. Burger; G. W. Dodson; L. D. Pham; R. P. Redwine; E. Piasetzky; H. W. Baer; J. D. Bowman; F. H. Cverna; M. J. Leitch; U. Sennhauser; Th. S. Bauer; C. H. Q. Ingram; G. S. Kyle; D. Ashery; S. A. Wood; Z. Fraenkel

doi:10.1103/PhysRevLett.57.2637

Measurement of the Reaction ${}^{16}O (π^{+}, π^{0} p)$

S. Gilad, S. Høibråten, W. J. Burger, G. W. Dodson, L. D. Pham, R. P. Redwine, E. Piasetzky, H. W. Baer, J. D. Bowman, F. H. Cverna, M. J. Leitch, U. Sennhauser, Th. S. Bauer, C. H. Q. Ingram, G. S. Kyle, D. Ashery, S. A. Wood, and Z. Fraenkel

Phys. Rev. Lett. 57, 2637 – Published 24 November 1986

Abstract

The first coincidence measurements of the ( $π^{+}, π^{0} p$ ) reaction are reported. These were performed on ${}^{16}O$ at $T_{π^{+}} = 245$ MeV for $θ_{π^{0}} = 50 ° - 130 °$ . Events corresponding to removal of $p$ -shell nucleons were identified by their $π^{0}$ and $p$ energies. The $π^{0}$ energy spectra for such events are compared to predictions of $Δ$ -hole model calculations; the calculations generally underestimate the ( $π^{+}, π^{0} p$ ) cross sections. At forward $π$ angles experimental ratios of the ( $π^{+}, π^{+} p$ ) and ( $π^{+}, π^{0} p$ ) reactions are shown to differ significantly from estimates based on free $π - N$ cross sections.

Received 5 June 1986

DOI:https://doi.org/10.1103/PhysRevLett.57.2637

Authors & Affiliations

S. Gilad^*, S. Høibråten, W. J. Burger^†, G. W. Dodson, L. D. Pham, and R. P. Redwine

Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

E. Piasetzky^‡, H. W. Baer, J. D. Bowman, F. H. Cverna, M. J. Leitch, and U. Sennhauser^†

Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Th. S. Bauer^§, C. H. Q. Ingram, and G. S. Kyle^∥

Schweizerisches Institut für Nuklearforschung, CH-5234 Villigen, Switzerland

D. Ashery and S. A. Wood^¶

School of Physics and Astronomy, Raymond and Beverly Sackler Faculty, Tel Aviv University, Tel Aviv, Israel

Z. Fraenkel

Weizmann Institute, Rehovot, Israel

^*Present address: Scitex Corp. Ltd., Herzlia, Israel.
^†Present address: Schweizerisches Institut für Nuklearforschung, CH-5234 Villigen, Switzerland.
^‡Present address: School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel.
^§Present address: Nationaal Instituut voor Kernfysica en Hoge-Energiefysica, Sektion K, NL-1009DB, Amsterdam, The Netherlands.
^∥Present address: Department of Physics, New Mexico State University, Las Cruces, NM 88003.
^¶Present address: Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139.