超对称U（1）B x U（1）L模型中的冷暗物质
Supersymmetric U(1)B x U(1)L model with leptophilic and leptophobic cold dark matters
摘要：
考虑一个具有自发破缺的额外$U(1)_B \times U(1)_L$规范对称性的超对称模型。该模型的显著特点是存在三种不同类型的冷暗物质（CDM）候选者，中性标量扇区具有丰富的结构。如果$U(1)_B$规范玻色子质量在$2 m_{χ_B}$附近，那么具有$σ_{\rm SI} \sim 10^{-3\pm 1}$ pb的轻CDM可以容易地被具有正确残余密度的疏轻子暗物质（$χ_B$）所容纳。此外，PAMELA和Fermi/LAT数据也可以用质量为$\sim 1$ TeV的亲轻子CDM来拟合。在大型强子对撞机上可能会有新的费米子和新的规范玻色子的有趣特征。
英文摘要：
We consider a supersymmetric model with extra $U(1)_B \times U(1)_L$ gauge symmetry that are broken spontaneously. Salient features of this model are that there are three different types of cold dark matter (CDM) candidates, and neutral scalar sector has a rich structure. Light CDM with $σ_{\rm SI} \sim 10^{-3\pm 1}$ pb can be easily accommodated by leptophobic dark matter ($χ_B$) with correct relic density, if the $U(1)_B$ gauge boson mass is around $2 m_{χ_B}$. Also the PAMELA and Fermi/LAT data can be fit by leptophilic CDM with mass $\sim 1$ TeV. There could be interesting signatures of new fermions and new gauge bosons at the LHC.
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