Comparison of (π− d→nn withdσ(π+ d→pp) to test charge symmetry in the Δ-region
Nefkens, B. M. K. ; Adrian, S. D. ; Barlow, D. B. ; DiBernardo, P. ; Eichon, A. D. ; Kessler, R. S. ; Labrenz, J. N. ; Pillai, C. ; Price, J. W. ; Wightman, J. A. ; Briscoe, W. J. ; Kramer, L. H. ; Taragin, M. F. ; Ottewell, D. F.
Springer
Published 1992
Springer
Published 1992
| ISSN: |
1432-5411
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|---|---|
| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Physics
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| Notes: |
Abstract First results on π− d → are reported. The measurements were made using 8 specially designed neutron counters, which were carefully calibratedin situ. The differential cross sections atT π=142, 180, 217, and 254 MeV were obtained at four angles between 0° and 90°, they are compared to π+ d →pp data measured at the same energies and angles with the same setup. At every beam energy, the shape of the angular distributions of π− d →nn and π+ d →pp is the same to ±2%. The absolute cross sections differ by 1 to 10%. The error in this comparison is ±4% implying a small violation of charge symmetry.
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| Type of Medium: |
Electronic Resource
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| URL: |