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I've seen discussion of Mellin amplitudes/transforms and whatnot show up for a while in the CFT literature, but I've never seen a good resource for understanding what they are intuitively. Can anyone recommend either a set of lecture notes or a good pedagogical treatment of Mellin transforms in CFT?
For a treatsie on the application of Mellin Transformations and amplitudes from first principles (and the conjecture on Massive Field Theories) see Mack's paper below.
D-independent representation of Conformal Field Theories in D dimensions via transformation to auxiliary Dual Resonance Models. Scalar amplitudes G. Mack https://arxiv.org/pdf/0907.2407.pdf
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