Measurements of asymmetries of pion single charge exchange on polarized 3He at 200 MeV

Q. Zhao, G. Burleson, S. Blanchard, T. Chang, W. Gibbs, J. Haas, B. Park, M. Whitton, M. Espy, D. Dehnhard, B. Larson, J. O'Donnell, M. Palarczyk, W. Cummings, P. Delheij, O. Häusser, E. Pasyuk, M. Gostkin, J. Amann, R. BoudrieC. Riedel, C. Morris, S. Pentillä, D. Swenson, D. Tupa, J. Comfort, C. Gaulard, K. Maeda, G. Glass, I. Supek

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1 Scopus citations


Asymmetries for the (π-, π0) reaction on polarized 3He were measured using a 200-MeV pion beam at LAMPF. The π0, s were detected with the neutral meson spectrometer in coincidence with the recoiling tritons. A recoil triton detector, consisting of scintillation-counter telescopes and a wire chamber, was used to measure the time-of-flight, energy loss, and direction of the tritons. The polarized gaseous 3He target, developed at TRIUMF, was modified to run with two diode lasers; the polarization reached 65%. The asymmetries between θlab =60° and 105° were found to be strongly angle dependent. The results are compared with theoretical calculations.

Original languageEnglish (US)
Article number024001
Pages (from-to)240011-2400111
Number of pages2160101
JournalPhysical Review C - Nuclear Physics
Issue number2
StatePublished - Aug 1999

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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