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Lifetime measurement of atoms consisting of pi+ and pi- mesons
The lifetime measurement of pi+pi- atoms (A2pi) with 10% precision provides in a model independent way the difference between the S-wave pion-pion scattering lengths for isospin 0 and 2, |a0 -a2|, with 5% accuracy. The scattering lengths a0 and a2 have been calculated in Chiral Perturbation Theory (...
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| Lenguaje: | eng |
| Publicado: |
2003
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| Acceso en línea: | http://cds.cern.ch/record/676526 |