论文标题
$ u（1）_x $ ssm中的轻中性intrino暗物质
Light neutralino dark matter in $U(1)_X$SSM
论文作者
论文摘要
$ u（1）_x $最小超对称标准模型（MSSM）的扩展称为$ u（1）_x $ ssm，与本地 量规组$ su（3）_c \ times su（2）_l \ times u（1）_y \ times u（1）_x $。 $ u（1）_x $ ssm有三个Singlet Higgs超级场 MSSM。在$ u（1）_x $ ssm中，中inino的质量矩阵为$ 8 \ times8 $，其最轻的质量特征性具有冷暗物质的特征。假设最轻的中性诺作为暗物质候选者，我们研究了遗物密度。对于核的暗物质散射，研究了包括自旋非依赖性和自旋依赖性的横截面。在我们的数值结果中，一些参数空间可以满足遗物密度和暗物质直接检测的实验的约束。
The $U(1)_X$ extension of the minimal supersymmetric standard model(MSSM) is called as $U(1)_X$SSM with the local gauge group $SU(3)_C\times SU(2)_L \times U(1)_Y \times U(1)_X$. $U(1)_X$SSM has three singlet Higgs superfields beyond MSSM. In $U(1)_X$SSM, the mass matrix of neutralino is $8\times8$, whose lightest mass eigenstate possesses cold dark matter characteristic. Supposing the lightest neutralino as dark matter candidate, we study the relic density. For dark matter scattering off nucleus, the cross sections including spin-independent and spin-dependent are both researched. In our numerical results, some parameter space can satisfy the constraints from the relic density and the experiments of dark matter direct detection.
