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

Journal Article · Sun Aug 01 04:00:00 EDT 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.60.024001· OSTI ID:357332

Zhao, Q; Burleson, G; Blanchard, S; Chang, T; Gibbs, W; Haas, J; Park, B; Whitton, M ^[1]; Espy, M; Dehnhard, D; Larson, B; ODonnell, J; Palarczyk, M ^[2]; Cummings, W; Delheij, P; Haeusser, O ^[3]; Pasyuk, E; Gostkin, M ^[4]; Amann, J; Boudrie, R ; Riedel, C; Morris, C; Pentillae, S; Swenson, D; Tupa, D ^[5]; Comfort, J; Gaulard, C ^[6]; Maeda, K ^[7]; Glass, G ^[8]; Supek, I ^[9]

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1. Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
2. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
3. Tri-University Meson Facility, Vancouver, V6T 2A3 (CANADA)
4. JINR, Dubna, Moscow (Russia)
5. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
6. Department of Physics, Arizona State University, Tempe, Arizona 85281 (United States)
7. Department of Physics, Tohoku University, Kawauchi, Sendai (Japan)
8. University of Texas, Austin, Texas 78712 (United States)
9. Rudjer Boskovic Institute, Zagreb (Croatia)

Asymmetries for the ({pi}{sup {minus}},{pi}{sup 0}) reaction on polarized {sup 3}He were measured using a 200-MeV pion beam at LAMPF. The {pi}{sup 0}{close_quote}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 {sup 3}He target, developed at TRIUMF, was modified to run with two diode lasers; the polarization reached 65{percent}. The asymmetries between {theta}{sub lab}=60{degree} and 105{degree} were found to be strongly angle dependent. The results are compared with theoretical calculations. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 357332
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 60; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ASYMMETRY
ATOMIC NUMBER
CHARGE EXCHANGE
DIFFERENTIAL CROSS SECTIONS
ENERGY LOSSES
MESON SPECTROSCOPY
PION MINUS REACTIONS
PIONS NEUTRAL
POLARIZATION
SPIN
TIME-OF-FLIGHT METHOD