Recent results on nucleon resonance electrocouplings from the studies of π^+π^-p electroproduction with the CLAS detector  

作　　者：V. I. Mokeev V. D. Burkert L. Elouadrhiri G. V. Fedotov E. N. Golovach B. S. Ishkhanov 

机构地区：[1]Jefferson Lab, Newport News, 12000 Jefferson Ave, VA 23606, USA [2]Skobeltsyn Nuclear Physics Institute at Moscow State University, Moscow 119899, Russia [3]Physics Department at Moscow State University, Moscow 119899, Russia

出　　处：《Chinese Physics C》2009年第12期1210-1215,共6页中国物理C（英文版）

基　　金：Supported by U.S.Department of Energy and the National Science Foundation, the Skobeltsyn Nuclear Physics Institute and Physics Department at Moscow State University;Jefferson Science Associates (JSA) operates the Thomas Jefferson National Accelerator Facility for the U.S.Department of Energy under contract DE-AC05-060R23177

摘　　要：Recent results on nucleon resonance studies in π＋π-p electro- production off protons with the CLAS detector are presented. The analysis of CLAS data allowed us to determine all essential contributiag mechanisms, providing a credible separation between resonant and non-resonant parts of the cross sections in a wide kinematical area of invariant masses of the final hadronic system 1.3 〈 W 〈 1.8 GeV and photon virtutualities 0.2 〈 Q2 〈 1.5 GeV2. Electrocouplings of several excited proton states with masses less than 1.8 GeV were obtained for the first time from the analysis of π＋π-p exclusive electroproduction channel.Recent results on nucleon resonance studies in π＋π-p electro- production off protons with the CLAS detector are presented. The analysis of CLAS data allowed us to determine all essential contributiag mechanisms, providing a credible separation between resonant and non-resonant parts of the cross sections in a wide kinematical area of invariant masses of the final hadronic system 1.3 〈 W 〈 1.8 GeV and photon virtutualities 0.2 〈 Q2 〈 1.5 GeV2. Electrocouplings of several excited proton states with masses less than 1.8 GeV were obtained for the first time from the analysis of π＋π-p exclusive electroproduction channel.

关 键 词：nucleon resonances electromagnetic form factors nucleon structure 

分 类 号：O572.2[理学—粒子物理与原子核物理]