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On the low-energy limit of the QED N-photon amplitudes

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arxiv hep-th/0301022 v3 pith:ODKYAKKF submitted 2003-01-06 hep-th hep-ph

On the low-energy limit of the QED N-photon amplitudes

classification hep-th hep-ph
keywords amplitudeslimitn-photonarbitraryassignmentscasecorrectionsderive
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We derive an explicit formula for the low energy limits of the one-loop, on-shell, massive N-photon amplitudes, for arbitrary N and all helicity assignments, in scalar and spinor QED. The two-loop corrections to the same amplitudes are obtained for up to the ten point case. All photon amplitudes with an odd number of `+' helicities are shown to vanish in this limit to all loop orders.

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    The gamma-UPC+MG5_aMC framework is presented as the first automated NLO tool for photon-photon processes in UPCs, reviewed alongside recent fixed-order NLO results and data comparisons.