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The European Physical Journal C

, Volume 60, Issue 1, pp 83–105 | Cite as

Electromagnetic corrections in η→3π decays

  • Christoph Ditsche
  • Bastian KubisEmail author
  • Ulf-G. Meißner
Regular Article - Theoretical Physics

Abstract

We re-evaluate the electromagnetic corrections to η→3π decays at next-to-leading order in the chiral expansion, arguing that effects of order e 2(m u m d ) disregarded so far are not negligible compared to other contributions of order e 2 times a light-quark mass. Despite the appearance of the Coulomb pole in ηπ + π π 0 and cusps in η→3π 0, the overall corrections remain small.

PACS

12.39.Fe 13.25.Jx 13.40.Ks 

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2009

Authors and Affiliations

  • Christoph Ditsche
    • 1
  • Bastian Kubis
    • 1
    Email author
  • Ulf-G. Meißner
    • 1
    • 2
  1. 1.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical PhysicsUniversität BonnBonnGermany
  2. 2.Institut für Kernphysik (Theorie), Institute for Advanced Simulations, and Jülich Center for Hadron PhysicsForschungszentrum JülichJülichGermany

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