Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-10-18
Nucl.Phys. B468 (1996) 219-240
Physics
High Energy Physics
High Energy Physics - Phenomenology
26 pages in latex, 4 uu-encoded ps-figs
Scientific paper
10.1016/0550-3213(96)00111-3
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.
Coriano' Claudio
Parwani Rajesh R.
White Alan R.
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