Faddeev calculations on lambda hypertriton with potentials from Gel'fand–Levitan–Marchenko theory  

作　　者：E F Meoto M L Lekala 

机构地区：[1]Department of Physics,University of South Africa,Private Bag X6,1710 Johannesburg,South Africa

出　　处：《Communications in Theoretical Physics》2020年第10期119-124,共6页理论物理通讯（英文版）

摘　　要：Effective lambda-proton and lambda-neutron potentials,restored from theoretical scattering phases through Gel'fand–Levitan–Marchenko theory,are tested on a lambda hypertriton through three-body calculations.The lambda hypertriton is treated as a three-body system consisting of lambda-proton,lambda-neutron and proton–neutron subsystems.Binding energy and root mean square radius are computed for the ground state of lambda hypertriton(Jp=12+).In coordinate space,the dynamics of the system is described using a set of coupled hyperradial equations obtained from the differential Faddeev equations.By solving the eigenvalue problem derived from this set of coupled hyperradial equations,the binding energy and root mean square matter radius computed are found to be-2.462 MeV and 7.00 fm,respectively.The potentials are also shown to display a satisfactory convergence behaviour.

关 键 词：lambda-nucleon potential lambda-proton potential lambda-neutron potential lambda hypertriton Faddeev equations hyperspherical method 

分 类 号：O571[理学—粒子物理与原子核物理]