EPJ Web of Conferences (Apr 2010)

Pionic Deuterium

  • Schlesser S.,
  • Schmid Ph.,
  • dos Santos J.M.F.,
  • Nekipelov M.,
  • Le Bigot E.-O.,
  • Indelicato P.,
  • Hirtl A.,
  • Gruber A.,
  • Gotta D.,
  • Gorke H.,
  • Covita D.S.,
  • Bühler P.,
  • Anagnostopoulos D.F.,
  • Amaro F.D.,
  • Strauch Th.,
  • Simons L.M.,
  • Trassinelli M.,
  • Veloso J.F.C.A.,
  • Zmeskal J.

DOI
https://doi.org/10.1051/epjconf/20100303006
Journal volume & issue
Vol. 3
p. 03006

Abstract

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The strong interaction shift ε1sπD and broadening Γ1sπD in pionic deuterium have been remeasured with high statistics by means of the πD(3p − 1s) X-ray transition using the cyclotron trap and a high-resolution crystal πD πD spectrometer. Preliminary results are ε1sπD = (−2325 ± 31) meV (repulsive) and Γ1sπD(1171+23-49) meV which yields for the πD scattering length aπD = [−(24.8 ± 0.3) + i (6.3-0.3+0.1)] · 10−3 mπ−1. From the imaginary part the threshold parameter for pion production is determined to be α = (252−11+15) µb.