Luminosity determination for the dd→αK+K-experiment at ANKE/COSY

中国物理C, 2009, 33(1): 20-23.

^1, , ^2, , ^3,

1.Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Graduate University of Chinese Academy of Sciences,Beijing 100049,China;Jülich Centre for Hadron Physics (JCHP) and Institut für Kernphysik,Forschungszentrum Jülich,D-52424 J

2.Jülich Centre for Hadron Physics (JCHP) and Institut für Kernphysik,Forschungszentrum Jülich,D-52424 Jülich,Germany;High Energy Physics Department,Petersburg Nuclear Physics Institute,Gatchina,Russia

3.Jülich Centre for Hadron Physics (JCHP) and Institut für Kernphysik,Forschungszentrum Jülich,D-52424 Jülich,Germany

基金项目: Deutscher Akademischer Anstausch Dienst

Luminosity determination for the dd→αK+K-experiment at ANKE/COSY

YUAN Xiao-Hua ^1, , Dzyuba Alexey ^2, , Biischer Markus ^3,

1.Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Graduate University of Chinese Academy of Sciences,Beijing 100049,China;Jülich Centre for Hadron Physics (JCHP) and Institut für Kernphysik,Forschungszentrum Jülich,D-52424 J

2.Jülich Centre for Hadron Physics (JCHP) and Institut für Kernphysik,Forschungszentrum Jülich,D-52424 Jülich,Germany;High Energy Physics Department,Petersburg Nuclear Physics Institute,Gatchina,Russia

3.Jülich Centre for Hadron Physics (JCHP) and Institut für Kernphysik,Forschungszentrum Jülich,D-52424 Jülich,Germany

Keywords： luminosity

High resolution studies of a0/f0(980) decays into channels involving open strangeness are currently being performed at COSY-Jfilich.As a "filter" for isospin-zero intermediate states,i.e.to selectively produce the fo(980) resonance,the dd→αK+K- reaction was measured with the magnetic ANKE spectrometer.In order to determine the luminosity of this experiment,the elastically and quasi-elastically scattered deuterons were recorded simultaneously with the αK + K- events.Here we report about the luminosity determination via investigating the (quasi-) elastic deuterons at ANKE.

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