2007/07/23 by R. Nasseripour, M. H. Wood, C. Djalali +98 · 77 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Meson #Nuclear physics #Omega #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #nucl-ex
paper · pdf · doi:10.1103/physrevlett.99.262302
published in Physical Review Letters 99(26), 262302 (American Physical Society) · 8 pages, 4 figures
arxiv created 2007/07/23 · openalex publication_date 2007/12/27 · arxiv updated 2010/04/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The photoproduction of vector mesons on various nuclei has been studied using the CLAS detector at Jefferson Laboratory. The vector mesons, \ensuremathρ, \ensuremathω, and \ensuremathφ, are observed via their decay to e+e^\ensuremath-, in order to reduce the effects of final-state interactions in the nucleus. Of particular interest are possible in-medium effects on the properties of the \ensuremathρ meson. The \ensuremathρ mass spectrum is extracted from the data on various nuclei, 2H, C, Fe, and Ti. We observe no significant mass shift and some broadening consistent with expected collisional broadening for the \ensuremathρ meson.