2004/04/30 by G. Marchesini, E. Onofri
Physics and Astronomy · #Amplitude #Classical mechanics #Evolution equation #High-Energy Particle Collisions Research #Jet (fluid) #Mathematical analysis #Mathematical physics #Multiplicity (mathematics) #Particle physics #Particle physics theoretical and experimental studies #Phase space #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Quark #Scattering #Scattering amplitude #Space (punctuation) #hep-ph
paper · pdf · doi:10.1088/1126-6708/2004/07/031
published as JHEP 0407 (2004) 031 · 18 pages, 3 figures, using JHEP3.cls Corrected typos
arxiv created 2004/06/29 · openalex publication_date 2004/07/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
It has been recently found that the heavy quark-antiquark QQbar pair multiplicity, in certain phase space region (QQbar at short distance, soft and with small velocity), satisfies an evolution equation formally similar to the BFKL equation for the high energy scattering amplitude. We find the exact solution of the QQbar-equation and discuss the differences with the BFKL scattering amplitude.