Comparison of (π-d→nn with dσ(π+d→pp) to test charge symmetry in the Δ-region Article

cited authors

  • Nefkens, BMK; Adrian, SD; Barlow, DB; DiBernardo, P; Eichon, AD; Kessler, RS; Labrenz, JN; Pillai, C; Price, JW; Wightman, JA; Briscoe, WJ; Kramer, LH; Taragin, MF; Ottewell, DF

fiu authors


  • First results on π-d → are reported. The measurements were made using 8 specially designed neutron counters, which were carefully calibrated in situ. The differential cross sections at Tπ=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. © 1992 Springer-Verlag.

publication date

  • June 1, 1992

Digital Object Identifier (DOI)

start page

  • 133

end page

  • 140


  • 12


  • 2-4