The European Physical Journal A

, Volume 31, Issue 4, pp 522–526 | Cite as

Measurement of pionium lifetime with the Dirac spectrometer

QNP 2006

Abstract.

Pionium ( π + π - bound state) lifetime is measured with improved precision with respect to earlier work, and the ππ s-wave scattering length difference between I = 0 and I = 2 amplitudes | a 0 - a 2| is determined to 5% precision.

PACS.

13.75.Lb Meson-meson interactions 12.39.Fe Chiral Lagrangians 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  1. 1.IGFAEUniversidade de Santiago de CompostelaSantiago de CompostelaSpain

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