Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-07-12
Nucl.Phys.B617:253-290,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
37 pages, Latex, axodraw, epsfig, 11 figures
Scientific paper
10.1016/S0550-3213(01)00469-2
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.
Cacciari Matteo
Catani Stefano
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