2009/08/10 by S. R. Gevorkyan, S. Gevorkyan, A. Gasparian +3
Physics and Astronomy · #Cross section (physics) #Glauber #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Pseudoscalar #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Radiative transfer #Scattering #hep-ph
paper · pdf · doi:10.1134/s1547477112010116
published as Physics of Particles and Nuclei Letters 9, 18 (2012) · 12 pages,2 figures
arxiv created 2009/08/10 · openalex publication_date 2012/01/01 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Recent advances in the photon tagging facilities together with the novel, high-resolution fast calorimetry make it possible to perform photoproduction cross section measurements of pseudoscalar mesons on nuclei with a percent level accuracy. The extraction of the radiative decay widths, needed for testing the symmetry breaking effects in QCD, from these measurements at small angles is done by the Primakoff method. This method requires theoretical treatment of all processes participating in these reactions at the same percent level. The most updated description of general processes, including the nuclear coherent amplitude, is done in our previous paper. In this work, in the framework of the Glauber multiple scattering theory, we obtain analytical expressions for the incoherent cross section of the photoproduction of pseudoscalar mesons off nuclei accounting for the mesons absorption in nuclei and the Pauli suppression at forward production angles. As illustrations of the obtained formulas, we calculate the incoherent cross section for photoproduction from a closed shell nucleus, 16 O, and from an unclosed shell nucleus, 12 C. These calculations allow one to compare different approaches and estimate their impact on the incoherent cross section of the processes under consideration.