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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 544097.0, MPI für Physik / MPI für Physik
Resummation of Soft Gluon Logarithms in the DGLAP Evolution of Fragmentation Functions
Authors:Albino, S.; Kniehl, B. A.; Kramer, G.; Ochs, W.
Date of Publication (YYYY-MM-DD):2006
Title of Journal:Physical Review D
Journal Abbrev.:Phys.Rev.D
Issue / Number:73
Start Page:054020
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We define a general scheme for the evolution of fragmentation functions which resums both soft gluon logarithms and mass singularities in a consistent manner and to any order, and requires no additional theoretical assumptions. Using the Double Logarithmic Approximation and the known perturbative results for the splitting functions, we present our scheme with the complete contribution from the double logarithms, being the largest soft gluon logarithms. We show that the resulting approximation is more complete than the Modified Leading Logarithm Approximation even with the fixed order contribution calculated to leading order only, and find, after using it to fit quark and gluon fragmentation functions to experimental data, that this approximation in our scheme gives a good description of the data from the largest x_p values to the peak region in xi=ln (1/x_p), in contrast to other approximations. In addition, we develop a treatment of hadron mass effects which gives additional improvements at large xi.
Classification / Thesaurus:Phenomenology of High Energy Physics
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2005-123
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/hep-ph/0510319
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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