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arxiv: 1002.3452 · v1 · pith:FA6DPZMNnew · submitted 2010-02-18 · ✦ hep-ph · hep-th

Soft photon anomaly and gauge/string duality

classification ✦ hep-ph hep-th
keywords softbremsstrahlungdistributionphotonphotonsangularannihilationanomalous
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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.

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