摘要
Because the lowest ∑^(*) state with quantum numbers spin-parity J^(P)=1/2-is far from being established experimentally and theoretically,we perform a theoreticalstudy on the ∑^(*)_(1/2)-photo-production within the Regge-effective Lagrangian approach.Considering that ∑^(*)_(1/2)-couples to the KN channel,westudy the contributions from the t-channel K^(*) exchange diagram.Moreover,the contributions from the t-channel K^(*) exchange,s-channel nucleon pole,u-channel 2 exchange,and contact term are considered.The differential and total cross sections of the processγn→K+∑^(*)_(1/2)-are predicted with our model parameters.The results should help in experimentaly searching for the ∑^(*)_(1/2)-state in the future.
作者
吕云鹤
张晗
韦能昌
柯百谦
王恩
谢聚军
Yun-He Lyu;Han Zhang;Neng-Chang Wei;Bai-Cian Ke;En Wang;Ju-Jun Xie(School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Bejing 101408,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Southern Center for Nuclear-Science Theory(SCNT),Institute of Modern Physics,Chinese Academy of Sciences,Huizhou 516000,China)
基金
Supported by the National Natural Science Foundation of China(12192263,12075288,11735003,11961141012)
the Natural Science Foundation of Henan(222300420554)
the Project of Youth Backbone Teachers of Colleges and Universities of Henan Province(2020GGJS017)
the Youth Talent Support Project of Henan(2021HYTP002)
the Open Project of Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology(NLK2021-08)
the Youth Innovation Promotion AssociationCAS。
