\begin{document}$SU(3)_C \times SU(2)_L \times U(1)_Y \times U(1)_B \times U(1)_L$\end{document}. Supposing the lightest scalar neutrino is a dark matter candidate, we study the relic density and the spin independent cross section of sneutrino scattering off a nucleon. We calculate the numerical results in detail and find a suitable parameter space. The numerical discussion can confine the parameter space and provide a reference for dark matter research."> Scalar neutrino dark matter in the BLMSSM -
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