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Determination of the {ital S}-wave scattering length in pionic deuterium with a high resolution crystal spectrometer

Journal Article · · Physical Review Letters
; ;  [1]; ; ; ; ; ; ; ;  [2]; ; ; ;  [3]; ;  [4]
  1. Institut de Physique de l`Universite, Breguet 1, CH-2000 Neuchatel (Switzerland)
  2. Institut fuer Teilchenphysik der Eidgenoessische Technische Hochschule Zuerich, CH-5232 Villigen PSI (Switzerland)
  3. Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)
  4. Ecole Mohammadia des Ingenieurs, Rabat (Morocco)
The pionic deuterium 3{ital P}{minus}1{ital S} x-ray transition was measured with a quartz crystal spectrometer in combination with a cyclotron trap and charge coupled device detectors. The strong interaction shift and total decay width of the 1{ital S} level are {epsilon}{sub 1{ital S}}(shift)=2.48{plus_minus}0.10 eV (repulsive), {Gamma}{sub 1{ital S}}(width)=1.02{plus_minus}0.21 eV, where the statistical and systematic errors were added linearly. They yield the total pionic deuterium {ital S}-wave scattering length: {ital a}{sub {pi}{sup {minus}}{ital d}}= {minus}0.0264({plus_minus}0.0011)+{ital i}0.0054({plus_minus}0.0011){ital m}{sub {pi}}{sup {minus}1}.
OSTI ID:
69256
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 74; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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