Σ? production in pn interactions at ANKE at COSY

15th Russian Youth Conference on Physics and Astronomy

物理学;天文学

Shikov, E.^1 ; Dzyuba, A.^1 ; Barsov, S.^1 ; Koptev, V.^1

High Energy Physics Department, Petersburg Nuclear Physics Institute, 188350 Gatchina, Russia^1

关键词: Cooler synchrotrons;    Energy dependence;    Excess energy;    Hyperon production;    Large parts;    Neutron target;    Nucleon-nucleon interaction;    Scientific programs;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/461/1/012041/pdf
DOI  :  10.1088/1742-6596/461/1/012041

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Study of light hyperon production in nucleon-nucleon interactions is a large part of scientific program at the ANKE-spectrometer which is an internal-beam experiment at the Cooler Synchrotron (COSY-Juelich). The Σ-production in pn collisions was studied at two proton beam momenta of 2915 MeV/c and 3015 MeV/c. The deuterium target was exploited as an effective neutron target due to measurement of "spectator" proton momentum to determine the energy of reaction. The Fermi motion allowed to cover a wide range of excess energy Q 30-130 MeV where data was absent. The Σ-production was identified by the missing mass technique. Preliminary result for the energy dependence of the pn → pK+Σ-total cross section is presented.