2008/09/09 by G. Fedotov, G. V. Fedotov, V. Mokeev +101 · 2 citations
Mathematics · Physics and Astronomy · #Algorithm #Bin #Hadron #High-Energy Particle Collisions Research #Mathematics #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #nucl-ex
paper · pdf · doi:10.1103/physrevc.79.015204
published as Phys.Rev.C79:015204,2009
arxiv created 2008/09/09 · openalex publication_date 2009/01/20 · openalex created_date 2016/06/24 · arxiv updated 2019/08/13 · openalex updated_date 2026/08/05
This paper reports on the most comprehensive data set obtained on differential and fully integrated cross sections for the process ep\ensuremath→e'p\ensuremathπ+\ensuremathπ^\ensuremath-. The data were collected with the CLAS detector at Jefferson Laboratory. Measurements were carried out in the as yet unexplored kinematic region of photon virtuality 0.2<Q2<0.6 GeV2 and invariant mass of the final hadron system W from 1.3 to 1.57 GeV. For the first time, nine independent one-fold differential cross sections were determined in each bin of W and Q2 covered by the measurements. A phenomenological analysis of the data allowed us to establish the most significant mechanisms contributing to the reaction. The nonresonant mechanisms account for a major part of cross sections. However, we find sensitivity to s-channel excitations of low-mass nucleon resonances, especially to the N(1440)P11 and N(1520)D13 states in kinematic dependencies of the one-fold differential cross sections.