On the lifetime of the π+ π- atom

A. Gall, J. Gasser, V. E. Lyubovitskij, A. Rusetsky

    Research output: Contribution to journal › Article

    52 Citations (Scopus)

    Abstract

    The π+ π- atom decays - in the ground state - predominantly into two neutral pions. We present a general expression for the corresponding decay width in the framework of QCD (including photons). It contains all terms at leading and next-to-leading order in isospin breaking. The result allows one to evaluate the combination |α0 - α2| of ππ S-wave scattering lengths from π+π- lifetime measurements, like the one presently performed by the DIRAC experiment at CERN.

    Original languageEnglish
    Pages (from-to)335-340
    Number of pages6
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume462
    Issue number3-4
    DOIs
    Publication statusPublished - 1999

    Fingerprint

    life (durability)
    decay
    wave scattering
    S waves
    atoms
    pions
    quantum chromodynamics
    ground state
    photons

    Keywords

    • Chiral perturbation theory
    • Hadronic atoms
    • Nonrelativistic effective Lagrangians

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    On the lifetime of the π+ π- atom. / Gall, A.; Gasser, J.; Lyubovitskij, V. E.; Rusetsky, A.

    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 462, No. 3-4, 1999, p. 335-340.

    Research output: Contribution to journal › Article

    Gall, A, Gasser, J, Lyubovitskij, VE & Rusetsky, A 1999, 'On the lifetime of the π+ π- atom', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 462, no. 3-4, pp. 335-340. https://doi.org/10.1016/S0370-2693(99)00918-1
    Gall A, Gasser J, Lyubovitskij VE, Rusetsky A. On the lifetime of the π+ π- atom. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1999;462(3-4):335-340. https://doi.org/10.1016/S0370-2693(99)00918-1
    Gall, A. ; Gasser, J. ; Lyubovitskij, V. E. ; Rusetsky, A. / On the lifetime of the π+ π- atom. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1999 ; Vol. 462, No. 3-4. pp. 335-340.
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