2009/06/30 by Emil Avsar, Edmond Iancu
Engineering · Mathematics · Physics and Astronomy · #Fluid Dynamics and Turbulent Flows #High-Energy Particle Collisions Research #Numerical methods in inverse problems #hep-ph
paper · pdf · doi:10.1016/j.nuclphysa.2009.08.001
published as Nucl.Phys.A829:31-75,2009 · 50 pages, v2 minor corrections, published in NPA
openalex publication_date 2009/08/11 · arxiv created 2009/09/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We considerably extend our previous analysis of the implementation of an absorptive boundary condition, which mimics saturation effects, on the linear CCFM evolution. We present detailed results for the evolution of the unintegrated gluon density in the presence of saturation and extract the energy dependence of the emerging saturation momentum. We show that CCFM and BFKL evolution lead to almost identical predictions after including the effects of gluon saturation and of the running of the coupling. We moreover elucidate several important and subtle aspects of the CCFM formalism, such as its relation to BFKL, the structure of the angular ordered cascade, and the derivation of more inclusive versions of CCFM. We also propose non--leading modifications of the standard CCFM evolution which may play an important role for phenomenological studies.