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arXiv · hep-ph/9510330

Scale Invariant $O(g^4)$ Lipatov Kernels at Non-Zero Momentum Transfer

C. Coriano`·R. R. Parwani·A. R. White
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Abstract

We summarize recent work on the evaluation of the scale invariant next-to-leading order Lipatov kernel, constructed via transverse momentum diagrams. At zero momentum transfer the square of the leading-order kernel appears together with an additional component, now identified as a new partial-wave amplitude, having a separate, holomorphically factorizable, spectrum. We present a simplified expression for the full kernel at non-zero momentum transfer and give a complete analysis of its infrared properties. We also construct a non-forward extension of the new amplitude which is infra-red finite and satifies Ward identity constraints. We conjecture that this new kernel has the conformal invariance properties corresponding to the holomorphic factorization of the forward spectrum.

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C. Coriano`, R. R. Parwani, A. R. White. 1995-10-18. Scale Invariant $O(g^4)$ Lipatov Kernels at Non-Zero Momentum Transfer. https://doi.org/10.1016/0550-3213(96)00111-3

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