Analysis of data for γp → f1(1285)p photoproduction  

作　　者：王爱超 韦能昌 黄飞 Ai-Chao Wang;Neng-Chang Wei;Fei Huang(College of Science,China University of Petroleum(East China),Qingdao 266580,China;School of Physics,Henan Normal University,Xinxiang 453007,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]College of Science,China University of Petroleum(East China),Qingdao 266580,China [2]School of Physics,Henan Normal University,Xinxiang 453007,China [3]School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 101408,China

出　　处：《Chinese Physics C》2024年第2期141-152,共12页中国物理C（英文版）

基　　金：Partially supported by the National Natural Science Foundation of China(12175240,12147153,11635009,12305097,12305137);the Fundamental Research Funds for the Central Universities;the China Postdoctoral Science Foundation(2021M693141,2021M693142)。

摘　　要：The photoproduction of the f1(1285)meson off the proton target is investigated within an effective Lagrangian approach.The t-channelρ-andω-exchange diagrams,u-channel nucleon-exchange diagram,generalized contact term,and s-channel pole diagrams of the nucleon and a minimal number of nucleon resonances are taken into account in constructing the reaction amplitudes to describe the experimental data.Three different models,that is,the Feynman,Regge,and interpolated Regge models,are employed,where the t-channel reaction amplitudes are constructed in Feynman,Regge,and interpolated Regge types,respectively.The results show that neither the Feynman model with two nucleon resonances nor the interpolated Regge model with one nucleon resonance can satisfactorily reproduce the available data forγp→f1(1285)p.Nevertheless,in the Regge model,when any one of the N(1990)7/2^(+),N(2000)5/2^(+),N(2040)3/2^(+),N(2060)5/2^(-),N(2100)1/2^(+),N(2120)3/2^(-),N(2190)7/2^(-),N(2300)1/2^(+),and N(2570)5/2^(-)resonances is considered,the data can be well described.The resulting resonance parameters are consistent with those advocated in the Particle Data Group(PDG)review.Further analysis shows that,in the high-energy region,the peaks of γp→f1(1285)p differential cross sections at forward angles are dominated by the contributions from t-channelρ-andω-exchange diagrams,while in low-energy region,the s-channel pole diagrams of resonances also provide significant contributions to theγp→f1(1285)p cross sections.

关 键 词：photoproduction reactions effective Lagrangian approach nucleon resonances 

分 类 号：O572.243[理学—粒子物理与原子核物理]