Pion absorption in 12C

R. Tacik, F. Farzanpay, E. L. Mathie, P. Amaudruz, J. T. Brack, L. Felawka, R. Meier, D. Ottewell, G. R. Smith, G. Hofman, M. Kermani, S. McFarland, K. Raywood, M. Sevior, F. Bonutti, P. Camerini, N. Grion, R. Rui, and E. F. Gibson
Phys. Rev. C 57, 1295 – Published 1 March 1998
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Abstract

We have studied the two reactions 12C(π+,pp) and 12C(π+,ppp) in one experiment, using the CHAOS spectrometer at TRIUMF, at incident pion energies of 200, 240, and 280 MeV. In both cases, we are able to distinguish between reaction mechanisms involving only the detected protons, and those in which additional nucleons must have participated, on the basis of missing momentum. In the case of 12C(π+,ppp), we identify events due to the two step process of π+p quasielastic scattering followed by two-nucleon absorption. Estimates are made for the total cross sections for the various absorption mechanisms.

  • Received 14 November 1997

DOI:https://doi.org/10.1103/PhysRevC.57.1295

©1998 American Physical Society

Authors & Affiliations

R. Tacik, F. Farzanpay, and E. L. Mathie

  • University of Regina, Regina, Saskatchewan, Canada S4S 0A2

P. Amaudruz, J. T. Brack*, L. Felawka, R. Meier, D. Ottewell, and G. R. Smith

  • TRIUMF, Vancouver, British Columbia, Canada V6T 2A3

G. Hofman*, M. Kermani, S. McFarland, K. Raywood, and M. Sevior

  • University of British Columbia, Vancouver, British Columbia, Canada V6T 2A6

F. Bonutti, P. Camerini, N. Grion, and R. Rui

  • University of Trieste and INFN Trieste, 34127 Trieste, Italy

E. F. Gibson

  • California State University, Sacramento, California 95819

  • *Present address: University of Colorado, Boulder, Colorado 80309-0446.
  • Present address: Physikalisches Institut, Universität Tübingen, 72076 Tübingen, Germany.
  • Present address: School of Physics, University of Melbourne, Parkville, Victoria, 3052, Australia.

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Vol. 57, Iss. 3 — March 1998

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