Soft photon anomaly and gauge/string duality

Abstract

Motivated by the recent DELPHI report on the anomalous photon production in e^+e^- annihilation, we exactly calculate the inclusive cross section of soft photons in the strong coupling limit of N=4 super Yang-Mills. We find that the energy distribution is that of the Bremsstrahlung, while the angular distribution is spherical. Our result elucidates a new non-perturbative source of soft photons not associated with the final state hadronic Bremsstrahlung.

22 pages

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• QED meson description of the anomalous particles at ~17 and ~38 MeV
• Soft photon production from real-time dynamics of jet fragmentation
• Four-point correlator of vector currents and electric current susceptibility in holographic QCD
• Exploring Nucleon Structure and the Proton Mass Problem through Holographic QCD