dorsal/arxiv
View SchemaCoherent and incoherent atomic scattering: Formalism and application to pionium interacting with matter
| Authors | T. A. Heim, K. Hencken, D. Trautmann, G. Baur |
|---|---|
| Categories | |
| ArXiv ID | physics/0003004 |
| URL | https://arxiv.org/abs/physics/0003004 |
| DOI | 10.1088/0953-4075/33/18/308 |
| Journal | J. Phys. B: At. Mol. Opt. Phys. 33 (2000) 3583-3604 |
Abstract
The experimental determination of the lifetime of pionium provides a very important test on chiral perturbation theory. This quantity is determined in the DIRAC experiment at CERN. In the analysis of this experiment, the breakup probabilities of of pionium in matter are needed to high accuracy as a theoretical input. We study in detail the influence of the target electrons. They contribute through screening and incoherent effects. We use Dirac-Hartree- Fock-Slater wavefunctions in order to determine the corresponding form factors. We find that the inner-shell electrons contribute less than the weakly bound outer electrons. Furthermore, we establish a more rigorous estimate for the magnitude of the contributions form the transverse current (magnetic terms thus far neglected in the calculations).
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"abstract": "The experimental determination of the lifetime of pionium provides a very\nimportant test on chiral perturbation theory. This quantity is determined in\nthe DIRAC experiment at CERN. In the analysis of this experiment, the breakup\nprobabilities of of pionium in matter are needed to high accuracy as a\ntheoretical input. We study in detail the influence of the target electrons.\nThey contribute through screening and incoherent effects. We use Dirac-Hartree-\nFock-Slater wavefunctions in order to determine the corresponding form factors.\nWe find that the inner-shell electrons contribute less than the weakly bound\nouter electrons. Furthermore, we establish a more rigorous estimate for the\nmagnitude of the contributions form the transverse current (magnetic terms thus\nfar neglected in the calculations).",
"arxiv_id": "physics/0003004",
"authors": [
"T. A. Heim",
"K. Hencken",
"D. Trautmann",
"G. Baur"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1088/0953-4075/33/18/308",
"journal_ref": "J. Phys. B: At. Mol. Opt. Phys. 33 (2000) 3583-3604",
"title": "Coherent and incoherent atomic scattering: Formalism and application to pionium interacting with matter",
"url": "https://arxiv.org/abs/physics/0003004"
},
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