A resummation of large sub-leading corrections at small x

Details A resummation of large sub-leading corrections at small x A resummation of large sub-leading corrections at small x

1998-06-25

arxiv.org/abs/hep-ph/9806482v2

JHEP 9807:019,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages LaTeX, 5 figures, includes JHEP.cls and cite.sty. Version 2 additionally includes an appendix, numerous clarification

Scientific paper

10.1088/1126-6708/1998/07/019

The NLL corrections to the BFKL kernel are known to be very large, to the extent that even for small values of alpha_s, they lead to physical cross sections which are not positive definite. It is shown in the context of a toy model, that such pathological behaviour is an artifact of the truncation at NLL order, and is associated in particular with double transverse logarithms. These are resummed in a manner consistent with the full NLL kernel, and are shown to change its properties quite considerably.

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