One-loop Gluon Amplitudes in AdS

Abstract

We initiate the study of one-loop gluon amplitudes in AdS space. These amplitudes were recently computed at tree level for a variety of backgrounds of the form $Ad{S}_{d+1}\times S^3$. For concreteness, we compute the one-loop correction to the massless gluon amplitude on $Ad{S}_5\times S^3$, which corresponds to the four-point correlator of the flavor current multiplet in the dual 4d $\mathcal{N}=2$ SCFT. This requires solving a mixing problem that involves tree-level amplitudes of arbitrarily massive Kaluza-Klein modes. The final answer has the same color structure as in flat space but the dependence on Mandelstam variables is more complicated, with logarithms replaced by polygamma functions.

v1: 37 pages, 5 figures, v2: minor improvements, published version, v3: a typo in (2.8) corrected