Abstract
QCD dynamics at small quark and gluon momentum fractions or large total energy, which plays a major role for DESY HERA, the Fermilab Tevatron, BNL RHIC and CERN LHC physics, is still poorly understood. For one of the simplest processes, namely b (b) over bar production, next-to-leading-order perturbation theory fails. We show that the combination of two recently developed theoretical concepts, ...
Abstract
QCD dynamics at small quark and gluon momentum fractions or large total energy, which plays a major role for DESY HERA, the Fermilab Tevatron, BNL RHIC and CERN LHC physics, is still poorly understood. For one of the simplest processes, namely b (b) over bar production, next-to-leading-order perturbation theory fails. We show that the combination of two recently developed theoretical concepts, the k(perpendicular to) factorization and the next-to-leading-logarithmic-approximation Balitskii-Fadin-Kuraev-Lipatov vertex, gives perfect agreement with data. One can therefore hope that these concepts provide a valuable foundation for the description of other high energy processes.
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