1999/08/31 by Barbara Clerbaux, B. Clerbaux, Clerbaux, Barbara · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9908519
The note includes plots presented in the vector meson discussion session of the Workshop of Low-x Physics (june 1999), Tel-Aviv, Israel. 12 pages, 7 figures, 1 table. New version with new model prediction
openalex publication_date 1999/08/31 · arxiv created 1999/09/27 · arxiv updated 2009/11/30 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28
A compilation of H1 and ZEUS cross section measurements for elastic vector meson production is presented as a function of the scale K2 = (Q2+MV2)/4, where Q2 is the exchanged photon virtuality and MV is the mass of the vector meson. The ratio of longitudinal to transverse cross sections R = σL/σT is presented as a function of Q2/M2V. The cross sections are separated in a transverse and a longitudinal component, and are presented as a function of K2. The intercept α(0) -- 1 governing the energy dependence of the vector meson cross sections is compared with the λ parameter measured in inclusive F2 analysis. For ρ meson production, the helicity amplitude ratios |Tij|/|T00|, extracted from the H1 and ZEUS measurements of the spin density matrix elements are presented as a function of Q2 and W and are compared to recent predictions.