On threshold resummation beyond leading 1 - x order

Grunberg, G. ; Ravindran, V. (2009) On threshold resummation beyond leading 1 - x order Journal of High Energy Physics, 2009 . 055 -556. ISSN 1126-6708

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Official URL: http://iopscience.iop.org/1126-6708/2009/10/055

Related URL: http://dx.doi.org/10.1088/1126-6708/2009/10/055

Abstract

We check against exact finite order three-loop results for the non-singlet F2 and F3 structure functions the validity of a class of momentum space ansaetze for threshold resummation at the next-to-leading order in 1 - x, which generalize results previously obtained in the large-β0 limit. We find that the ansaetze do not work exactly, pointing towards an obstruction to threshold resummation at this order, but still yield correct results at the leading logarithmic level for each color structures, as well as at the next-to-next-to-leading logarithmic level for the specific CF3 color factor. A universality of the leading logarithm contributions to the physical evolution kernels of F2 and F3 at the next-to-leading order in 1 - x is observed.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
Keywords:QCD; NLO Computations
ID Code:85419
Deposited On:02 Mar 2012 11:52
Last Modified:02 Mar 2012 11:52

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