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Pion-pion scattering lengths from $\pi^{+}\pi^{-}$ atom with the DIRAC experiment
The DIRAC experiment at CERN is presently measuring the lifetime of the pionium atom, a bound state of a pi /sup +/ and pi /sup -/ meson. The isospin 0 and 2 scattering length difference will be determined unambiguously once the value of the lifetime is known. In what follows we describe the present...
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| Lenguaje: | eng |
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2003
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| Acceso en línea: | https://dx.doi.org/10.1063/1.1664211 http://cds.cern.ch/record/818453 |