摘要
Effects ofΛΛω−tensor coupling on the spin symmetry ofΛspectra inΛ−nucleus systems are studied using relativistic mean-field theory.Taking 12C+Λas an example,it is found that the tensor coupling enlarges the spin−orbit splittings ofΛby a factor of 5 but has a negligible effect on the wave functions ofΛ.Similar conclusions are observed in otherΛ−nuclei,including ^(16)O+Λ,^(40)Ca+Λand ^(208)Pb+Λ.It is indicated that the spin symmetry in anti-lambda-nucleus systems is still a good approximation irrespective of the tensor coupling.
作者
SONG Chun-Yan
YAO Jiang-Ming
MENG Jie
宋春艳;尧江明;孟杰(State Key Laboratory of Software Development Environment,and School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191;School of Physical Science and Technology,Southwest University,Chongqing 400715;State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871;School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191;Department of Physics,University of Stellenbosch,Stellenbosch,South Africa)
基金
by the National Basic Research Program of China under Grant No 2007CB815000
the National Natural Science Foundation of China under Grant Nos 11005004,10947013,and 10975008
the State Key Laboratory of Software Development Environment under Grant No SKLSDE-2011ZX-18
the Southwest University Initial Research Foundation Grant to Doctor(No SWU109011)
the Fundamental Research Funds for the Central Universities under Grant No XDJK2010B007.
