2006/01/25 by M. Ciafaloni, Dimitri Colferai, D. Colferai +4
Mathematics · Physics and Astronomy · #Algorithm #Arithmetic #Factorization #High-Energy Particle Collisions Research #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Subtraction #hep-ph
paper · pdf · doi:10.1016/j.physletb.2006.03.014
published as Phys.Lett.B635:320-329,2006 · 14 pages, 8 figures
arxiv created 2006/01/25 · openalex publication_date 2006/03/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the relationship of ``physical'' parton densities defined by kt-factorisation, to those in the minimal subtraction scheme, by comparing their small-x behaviour. We first summarize recent results on the above scheme change derived from the BFKL equation at NLx level, and we then propose a simple extension to the renormalisation-group improved (RGI) equation. In this way we are able the examine the difference between resummed gluon distributions in the Q0 and MSbar schemes and also to show MSbar scheme resummed results for Pgg and approximate ones for Pqg. We find that, due to the stability of the RGI approach, small-x resummation effects are not much affected by the scheme-change in the gluon channel, while they are relatively more sensitive for the quark-gluon mixing.