Soft-gluon resummation for the fragmentation of light and heavy quarks

by Matteo CACCIARI (University of Parma & INFN Milano)

Friday 24 Aug 2001, 14:00 → 15:00 Europe/Zurich

TH Auditorium (CERN)

We present a QCD study of fragmentation processes for light and heavy quarks in the semi-inclusive region of large x, where soft-gluon logarithms are resummed to next-to-leading accuracy. 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. Some phenomenological applications, and the inclusion of non-perturbative contributions, are discussed.