论文部分内容阅读
The tetraneutron state is studied in the framework of the chiral quark model with tetrahedron configuration.The universal attraction property of σ-meson exchange leads to a strong attraction in the effective potential of the system.It is possible to form a bound state.For comparison,the naive quark model is also employed to carry out the calculation.A weak attraction,which is too weak to bind the system,is obtained.