Production of orbitally excited vector mesons in diffractive DIS

2005/05/31 by F. Caporale, Igor Ivanov, I. P. Ivanov
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/j.physletb.2005.06.075

published as Phys.Lett. B622 (2005) 55-62 · 9 pages, 5 figures

arxiv created 2005/05/31 · openalex publication_date 2005/07/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Within the k_t-factorization framework, we study diffractive production of orbitally excited vector mesons and compare it with the production of radial excitations, focusing on the rho(1450)/rho(1700) case. At small Q², orbital excitation of light quarkonia is found to dominate over radial excitations in diffractive production. We predict strong suppression of the production of orbital excitations by longitudinal photons, which leads to very small sigma_L/sigma_T ratio. At small Q², the s-channel helicity violating transitions contribute ∼ 10-15% of the transverse cross section and ∼ 50% of the longitudinal cross section. We also study mixing between radial and orbital excitations and determine strategies towards clarification of S-wave/D-wave assignment to rho(1450) and rho(1700) mesons. The results are compared with the experimental data available, and predictions for future experiments are given.

Citations

• Diffractive production of vector mesons in Deep Inelastic Scattering within k_t-factorization approach
• On the narrow dip structure at 1.9 GeV/c² in diffractive photoproduction
• Elastic electroproduction of