Recently Liang et al .
found a tentative line signal at about 43 GeV in the directions of sixteen nearby Galaxy Clusters .
If arising from dark matter annihilation , the mass of the dark matter particles should be m _ { \chi } \sim 43 GeV and the annihilation cross section \langle \sigma v \rangle \sim 5 \times 10 ^ { -28 } ( \overline { BF } / 10 ^ { 3 } ) ^ { -1 } ~ { } { % cm ^ { 3 } ~ { } s ^ { -1 } } is needed , where \overline { BF } is the averaged boost factor of the annihilation signal of these Galaxy Clusters .
In this work we discuss several models which could interpret these features and estimate the model parameters .
Usually sizeable coupling parameter is needed .
The 2 \sigma upper limits on the cross section of the dark matter annihilation into various final states such as b \bar { b } , \mu ^ { + } \mu ^ { - } and so on are also presented .