Theoretical study of the photoproduction off proton target based on the new CLAS data

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• 作者：Jun He^a ; ^b ; ^c
• 关键词：螞(1520)螞(1520) photoproduction ; Nucleon resonance ; Effective Lagrangian ; Constituent quark model
• 刊名：Nuclear Physics A
• 出版年：July 2014
• 年：2014
• 卷：927
• 期：Complete
• 页码：24-35
• 全文大小：461 K

文摘

Based on the high precision experimental data released by the CLAS Collaboration recently, the interaction mechanism of the photoproduction of k to view the MathML source">螞(1520)$螞(1520)$ off a proton target is investigated within a Regge-plus-resonance approach. With the decay amplitudes predicted in the constituent quark model, the roles played by nucleon resonances are studied. It is found that k to view the MathML source">N(2120)$N(2120)$ provides the most important contribution among the nucleon resonances predicted in the constituent quark model. The t channel contribution with Regge trajectories and the 螞 intermediate u channel are responsible to the behaviors of the differential cross section at forward and backward angles, respectively.