2004/09/30 by E. Ferreira, Evandro Maia Ferreira, V. L. Baltar +1 · 5 citations
Mathematics · Physics and Astronomy · #Amplitude #Dipole #Factorization #High-Energy Particle Collisions Research #Mathematics #Meson #Nuclear physics #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scattering #Scattering amplitude #Vector meson #Wave function #hep-ph
paper · pdf · doi:10.1016/j.nuclphysa.2004.12.040
published in Nuclear Physics A 748(3-4), 608-624 (Elsevier BV) · 21 pages, 9 figures, 12 eps files ; typos added
arxiv created 2004/11/18 · openalex publication_date 2004/12/24 · arxiv updated 2010/04/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In a framework for nonperturbative QCD calculation of high energy processes, the amplitudes for photo- and electroproduction of vector mesons are written as integrals of the overlap product of photon and vector meson wave functions, multiplied by the amplitude for the scattering of qq dipole pairs off the proton. For sizes of the overlap functions that are smaller than the typical ranges of the interaction of the dipoles with the proton, the amplitudes factorize in the form of integrals, here called overlap strengths, formed only with the overlap of the wave functions times the square of the dipole separation. The integration is extended over the light front coordinates describing the qq dipoles. With this result, the overlap strengths contain all Q2 dependence of the observables. We show the importance of this factorization in the description of the experimental data for all S-wave vector mesons.