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Article
Report number	hep-ph/0107138 ; CERN-TH-2001-174 ; UPRF-2001-11 ; CERN-TH-2001-174 ; UPRF-2001-11
Title	Soft-Gluon Resummation for the Fragmentation of Light and Heavy Quarks at Large x
Author(s)	Cacciari, Matteo (Parma U. ; INFN, Milan) ; Catani, Stefano (CERN)
Affiliation	(CERN) ; (INFN Milano)
Publication	2001
Imprint	12 Jul 2001
Number of pages	37
Note	37 pages, Latex, axodraw, epsfig, 11 figures
In:	Nucl. Phys. B 617 (2001) 253-290
DOI	10.1016/S0550-3213(01)00469-2
Subject category	Particle Physics - Phenomenology
Abstract	We present a QCD study of fragmentation processes for light and heavy quarks in the semi-inclusive region of large x. Large logarithmic terms, due to soft-gluon radiation, are evaluated and resummed to all perturbative orders in the QCD coupling alpha_s. Complete analytical results to next-to-leading logarithmic accuracy are given for one-particle and two-particle inclusive distributions in e+e- annihilation and DIS. Factorization of parton radiation at low transverse momenta is exploited to identify the universal (process-independent) perturbative fragmentation function that controls heavy-quark processes, and to perform next-to-leading logarithmic resummation of its soft-gluon contributions. To gauge the quantitative impact of resummation, we perform numerical studies of light- and heavy-quark fragmentation in e+e- collisions.
Copyright/License	Elsevier Science B.V.

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