| Autor: |
Dirk Trautmann, T A Heim, Kai Hencken, M Schumann, Gerhard Baur |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Journal of Physics B: Atomic, Molecular and Optical Physics. 35:2683-2692 |
| ISSN: |
0953-4075 |
| DOI: |
10.1088/0953-4075/35/12/304 |
| Popis: |
The experiment DIRAC at CERN aims to measure the lifetime of relativistic π+π- atoms (pionium) with an accuracy of 10%, requiring cross sections for the interaction of pionium with the target material with an accuracy of 1% as theoretical input. We calculate the excitation cross sections for the Coulomb interaction with the target atoms in the Glauber approximation which takes into account all multi-photon exchange processes. We find that they decrease the excitation cross sections, calculated to first order in the Born approximation, by more than 2-15% for target materials with increasing Z and all initial states, much worse than the desired accuracy of 1%. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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