| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1851976 | Physics Letters B | 2009 | 6 Pages |
Abstract
We present evidence for the first observation of electromagnetically bound π±K∓π±K∓-pairs (πK-atoms) with the DIRAC experiment at the CERN-PS. The πK -atoms are produced by the 24 GeV/c24 GeV/c proton beam in a thin Pt-target and the π±π± and K∓K∓-mesons from the atom dissociation are analyzed in a two-arm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173±54173±54πK-atoms. The mean life of πK-atoms is related to the s-wave πK-scattering lengths, the measurement of which is the goal of the experiment. From these first data we derive a lower limit for the mean life of 0.8 fs at 90% confidence level.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
B. Adeva, L. Afanasyev, Y. Allkofer, C. Amsler, A. Anania, A. Benelli, V. Brekhovskikh, G. Caragheorgheopol, T. Cechak, M. Chiba, P. Chliapnikov, C. Ciocarlan, S. Constantinescu, C. Curceanu, C. Detraz, D. Dreossi, D. Drijard, A. Dudarev, M. Duma,