Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1851919 | Physics Letters B | 2010 | 5 Pages |
Abstract
The modified evolution equation for parton distributions of Dokshitzer, Marchesini and Salam is extended to non-singlet deep inelastic scattering coefficient functions and the physical evolution kernels which govern their scaling violation. Considering the xâ1 limit, it is found that the leading next-to-eikonal logarithmic contributions to the physical kernels at any loop order can be expressed in term of the one-loop cusp anomalous dimension, a result which can presumably be extended to all orders in (1âx), and has eluded so far threshold resummation. Similar results are shown to hold for fragmentation functions in semi-inclusive e+eâ annihilation. Gribov-Lipatov relation is found to be satisfied by the leading logarithmic part of the modified physical evolution kernels.
Keywords
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Physical Sciences and Engineering
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Nuclear and High Energy Physics
Authors
G. Grunberg,