Low-energy photon-photon collisions to two-loop order

  • J. Gasser
Part IV Hadron Polarizabilities
Part of the Lecture Notes in Physics book series (LNP, volume 452)


I report on a recent calculation of the amplitude for γγπ0π0 to two loops in chiral perturbation theory.


Chiral Perturbation Theory Neutral Pion Chiral Expansion Pion Decay Constant Pion Polarizability 
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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • J. Gasser
    • 1
  1. 1.Institute for Theoretical PhysicsUniversity of BernSwitzerland

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