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Relativistic corrections to the Pionium Lifetime

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arxiv hep-ph/9905539 v2 pith:ILGSVCG3 submitted 1999-05-28 hep-ph

Xinwei Kong , Finn Ravndal This is my paper · ORCID
classification hep-ph
keywords relativisticlifetimenon-relativisticorderpioniumtheoryaccurateamplitude
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Next to leading order contributions to the pionium lifetime are considered within non-relativistic effective field theory. A more precise determination of the coupling constants is then needed in order to be consistent with the relativistic pion-pion scattering amplitude which can be obtained from chiral perturbation theory. The relativistic correction is found to be 4.1% and corresponds simply to a more accurate value for the non-relativistic decay momentum.

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  1. Hadronic atoms

    hep-ph 2024-12 unverdicted novelty 1.0 of 10

    A pedagogical survey of non-relativistic effective field theory for hadronic atoms, restating the known next-to-leading-order formulas for the pionic hydrogen energy shift and width.

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