Luminosity determination for the pd reaction at 2.14 GeV with WASA-at-COSY  

作　　者：郑川 M.Büscher P.Fedorets V.Hejny H.Stroher 徐瑚珊 袁小华 

机构地区：[1]Institut für Kernphysik,Forschungszentrum Jülich [2]Jülich Center for Hadron Physics,Forschungszentrum Jülich [3]Institute of Modern Physics,Chinese Academy of Sciences [4]Institute of Modern Physics,Fudan University [5]Institute for Theoretical and Experimental Physics,State Scientific Center of the Russian Federation

出　　处：《Chinese Physics C》2012年第7期605-609,共5页中国物理C（英文版）

基　　金：Supported by Forschungszentrum Jülich including the JCHP-FFE program;the European Community under the FP6 program (Hadron Physics, RII3-CT-2004-506078) & the FP7 program (FP7-INFRASTRUCTURES-2008-1, Grant N.227431);the German BMBF,the China-German CSC-HGF exchange program,the German Research Foundation(DFG)and National Natural Science Foundation of China (10635080, 10925526)

摘　　要：The luminosity for a WASA-at-COSY experiment involving the pd reaction at 2.14 GeV proton- beam energy is determined by the forward pd elastic scattering, which yields an average beam-on-target value of [5.2±0.3（stat）±0.3（syst）] × 10^30 s^-1 cm^-2. In addition, the forward pd elastic-scattering angular distribution is obtained with four-momentum transfer squared -t between 0.16 （GeV/c）2 and 0.78 （GeV/c）2 at this beam energy, which is compared with other experimental data and the pd double scattering model.The luminosity for a WASA-at-COSY experiment involving the pd reaction at 2.14 GeV proton- beam energy is determined by the forward pd elastic scattering, which yields an average beam-on-target value of [5.2±0.3（stat）±0.3（syst）] × 10^30 s^-1 cm^-2. In addition, the forward pd elastic-scattering angular distribution is obtained with four-momentum transfer squared -t between 0.16 （GeV/c）2 and 0.78 （GeV/c）2 at this beam energy, which is compared with other experimental data and the pd double scattering model.

关 键 词：LUMINOSITY PD elastic scattering angular distribution double scattering 

分 类 号：O572.212[理学—粒子物理与原子核物理]