Double Photoproduction of Neutral Pions on a Proton and a Deuteron

被引：0
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作者：
R. R. Dusaev
M. V. Egorov
机构：
[1] Physical-Technical Institute at National Research Tomsk Polytechnic University,
[2] Russian Federal Nuclear Center – Zababakhin All-Russian Scientific-Research Institute for Technical Physics,undefined
来源：
Russian Physics Journal | 2017年 / 60卷
关键词：
double photoproduction of pions; baryon resonances; pion scattering;
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学科分类号：
摘要：
Total cross sections of electromagnetic π0π0 formation processes on a proton and a deuteron in the photon energy range from threshold to Eγ ≤ 2 GeV are calculated. Construction of the single-particle photoproduction operator is based on a calculation of Born and resonance contributions calculated in the tree approximation. The main parameters of the nucleon resonances were found from the Particle Data Group (PDG) compilation. A satisfactory description of the р(γ, π0π0)р cross section was achieved assuming a leading role for the pion rescattering process π+π– → π0π0, whose contribution amounted to more than 1 μb in the vicinity of the D13(1520) resonance.
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页码：26 / 36
页数：10
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