EPJ Web of Conferences
Volume 3, 201019th International IUPAP Conference on Few-Body Problems in Physics
|Number of page(s)||10|
|Published online||12 April 2010|
Institut für Kernphysik, Forschungszentrum
2 Dept. of Physics, Coimbra University, P-3000 Coimbra, Portugal
3 Dept. of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
4 Stefan Meyer Institut for Subatomic Physics, Austrian Academy of Sciences, A-1090 Vienna, Austria
5 Zentralabteilung für Elektronik, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
6 Laboratoire Kastler Brossel, UPMC-Paris 6, ENS, CNRS; Case 74, 4 place Jussieu, F-75005 Paris, France
7 Laboratory for Particle Physics, Paul Scherrer Institut, CH–5232 Villigen, Switzerland
8 Dept. of Physics, Aveiro University, P-3810 Aveiro, Portugal
a present address: Dept. of Physics, Aveiro
University, P-3810 Aveiro, Portugal
b corresponding author: firstname.lastname@example.org
c present address: Universitätsklinik für Nuklearmedizin, Medizinische Universität Wien, 1090 Vienna, Austria
d present address: Inst. des NanoSciences de Paris, CNRS UMR7588 and UMPC-Paris 6, F-75015 Paris, France
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.
© Owned by the authors, published by EDP Sciences, 2010
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